ANSYS Release 8.1 New Feature Update 4/22/2004

New and Exiting Developments in: ANSYS Release 8.1 New and Exiting Developments in: Nonlinear Mechanics Physics Coupling Solver Performance Meshing CAD Integration Optimization 4/22/2004

ANSYS Release 8.1 This presentation is organized into four primary parts highlighting new v8.1 features: ANSYS Mechanical family of products. ANSYS Multiphysics ANSYS Workbench ANSYS DesignXplorer Parallel Performance Mechanical Multiphysics Workbench DesignXplorer Parallel 4/22/2004

ANSYS Release 8.1 Mechanical Products New Features Update 4/22/2004

Usability and Miscellaneous Mechanical Release 8.1: New Features Nonlinear analysis Contact Setup and Convergence Element Technology and Transient Dynamics Materials Technology and Curve Fitting Linear analysis CMS, Constant Material Damping and Linear Dynamics Enhancements Usability and Miscellaneous Usability and Other Enhancements Undocumented Features Solvers PCG, DPCG Sparse Other solver enhancement 4/22/2004

Mechanical Nonlinear Analysis 4/22/2004

Contact Setup and Convergence Mechanical Contact Setup and Convergence Contact setup: Enhanced contact-pair management allows more efficient setup and execution of a contact analysis. Benefits You can run a partial solution of the model in its initial configuration and postprocess contact quantities (such as contact pressure, penetration, status, etc.) at time 0, before the actual solution. The new capability allows you to identify contact configurations that may be at risk for convergence difficulties. You can reduce initial penetration or gap by physically moving contact nodes towards the target surface. Commands New options on the CNCHECK command Nonlinear diagnostics: To debug models that experience convergence difficulties due to contact. New command options allow you to track specific contact quantities during the solution (for example, result items such as contact penetration and chattering level, and some contact setting parameters such as contact stiffness and pinball radius). The contact data are computed on a per-contact-pair basis; that is, they represent a maximum or minimum value for the specified quantity over the entire contact pair. NLHIST command 4/22/2004

Contact Technology Diagnostics Mechanical Contact Technology Diagnostics View contact status before solving using CNCHECK,POST 4/22/2004

Contact Technology Diagnostics … Mechanical Contact Technology Diagnostics … Setup Nonlinear Diagnostics Monitoring: This step can be done either prior to running a solution or prior to executing a restart after a convergence failure. Commands: /SOL NLDIAG,NRRE,1 NLDIAG,EFLG,1 4/22/2004

Contact Technology Diagnostics … Mechanical Contact Technology Diagnostics … Results Variables: Track solution variables during SOLVE 4/22/2004

Contact Technology Diagnostics … Mechanical Contact Technology Diagnostics … Run the Solution and while the solution is running, activate results tracker plots of the variables created. These graphs should be updating as the solution progresses. 4/22/2004

Contact Technology Diagnostics … Mechanical Contact Technology Diagnostics … Plot NR Residuals during convergence problems. 4/22/2004

Other Contact Enhancements … Mechanical Other Contact Enhancements … An augmented Lagrange algorithm (when KEYOPT(2) = 0) improves convergence with very difficult models. Likewise, improved contact stiffness (which updates automatically per iteration when KEYOPT(10) = 2) allows improved convergence and more accurate solutions. This release adds CEINTF logic for solid-solid assemblies using MPC contact, providing more accurate solutions. Improved overconstraint detection for MPC contact allows more complex MPC models to solve successfully. Node-to-surface contact now fully supports all the same multi-physics DOFs that surface-to-surface contact supports. Benefits This offers users more contact options and, when applicable, the possibility of more efficient multi-physics runs. 4/22/2004

Multiphysics Contact Enhancements Mechanical Multiphysics Contact Enhancements Consider the FEA simulation of a resistance spot weld process using the plane67 thermal-electric elements and contact. Using conventional surface to surface contact, the model takes 65 iterations to converge. Using node-to-surface contact, this same model converges in only 37 iterations. Copper Electrodes Steel Plates Voltage Distribution Temperature Distribution 4/22/2004

Element Technology Mechanical In beam design, it is customary to employ components of stress that contribute to axial loads and bending in each direction separately. To that end, the BEAM188/BEAM189 elements now provide a linearized stress output as part of the SMISC output record. 4/22/2004

Element Technology … Mechanical The MPC184 multipoint constraint element's Revolute Joint and Universal Joint options now allow nonlinear stiffness, damping, and hysteretic friction on the unrestricted components of relative motion of the joints. MPC184 element with the Rigid option (KEYOPT(1) = 1) is now supported in modal and prestressed modal analyses using the Block Lanczos and QRDAMP eigensolvers (MODOPT,LANB and MODOPT,QRDAMP), and in modal harmonic and modal transient analyses (HROPT,MSUP and TRNOPT,MSUP). 4/22/2004

Transient Dynamics Mechanical HHT Time-Integration: When performing a full transient structural analysis, you can now select the HHT time-integration method as an alternative to the default Newmark method. Benefits: The HHT method offers better numerical damping capability, providing controllable numerical damping in the higher frequency modes while maintaining accuracy in the important low frequency modes. Commands: To activate the HHT time-integration method, set TINTOPT = HHT on the TRNOPT command and input related integration parameters via the TINTP command. From within the ANSYS GUI, you can access these settings via the Solution Controls dialog box. 4/22/2004

Transient Dynamics … Mechanical You can now issue a PRNSOL or PLNSOL command to list or plot, respectively, the nodal velocity and nodal acceleration in the /POST1 postprocessor as you would with a nodal displacement solution. You can also issue a PRVAR or PLVAR command to list or plot, respectively, the time history of velocity and acceleration for a specified node in the /POST26 postprocessor. 4/22/2004

Materials Technology Mechanical Gasket Transverse Shear: Transverse shear stiffness can now be included as a material property for gasket elements (INTER192 -INTER194). By default, gasket elements account for through-thickness behavior only, but now you can enable the transverse shear stress option by setting KEYOPT(2) = 1. Benefits Use of this option helps to eliminate rigid body motion of the gasket. In previous releases this rigid body motion had to be restricted by restraining the DOF in the transverse direction. Commands You can define transverse shear stiffness via the gasket material command TB,GASKET with TBOPT = TSS. By default, stable stiffness is used if the transverse shear stiffness is not defined. 4/22/2004

Materials Technology … Mechanical Materials Technology … As with gasket pressure, transverse shear stress is also available for post processing via conventional procedures. By GUI method: Or by commands method: PLNSOL, GKS,XY PLESOL, GKS,XY Model Deflections 4/22/2004

Curve Fitting Enhancement Mechanical Curve Fitting Enhancement The Curve Fitting Tool (TBFT) now allows selected coefficients to be fixed. This is very useful, especially for viscoelasticity and creep. Benefits Viscoelasticity: Solve for one temperature, fix all of the coefficients except for the shift coefficients and then solve for each new temperature. This simplifies the solution. Creep: If the creep data is temperature independent, set the temperature coefficient to zero and fix it. Hyperelasticity: First solve for a lower order model (e.g., 2nd order Ogden), then solve for a higher order model (e.g., 3rd order Ogden) after fixing the first few coefficients of the lower order model (e.g., the first 4 coefficients from the 2nd order Ogden model). 4/22/2004

Curve Fitting Enhancement … Mechanical Curve Fitting Enhancement … Fix constants Vary constants 4/22/2004

Mechanical Linear Dynamics 4/22/2004

CMS Analysis Mechanical General Idea Modal Representation: Describe the motion separately over each of the substructures (components). Synthesis: Constrain the components to work together as a single structure by satisfying inter-component compatibility and equilibrium constraints. Why use CMS ? Flexibility: If only a part of a large assembly needs redesigned, such as the landing gear of an aircraft assembly, CMS provides the flexibility to just modify that Component, landing gear in this case, and do a CMS use pass run to get the response of the full assembly. Better Preliminary Analyses: For example, car companies have CMS files for various car body parts such as roofs, doors panels, et al. Using CMS they are able to find out the response of a full model car configuration by selecting a door and a roof from different door and roof models that they already have CAE data for. Optimize Designs: Different groups are free to design different parts allowing for optimized designs 4/22/2004

CMS Enhancement Mechanical Free-interface method: ANSYS now supports the free-interface CMS analysis method. The new method allows unconstrained interface nodes and considers rigid body modes in the CMS superelement generation pass. Benefits While the fixed-interface method (ANSYS 8.0) is preferable in most CMS analyses, ANSYS recommends the free-interface method when your analysis requires more accurate eigenvalues computed at the mid- to high-end of the spectrum. With the free-interface method, the matrix employed for CMS transformations is different than that for the fixed-interface method Expand all eigen modes: You can now expand CMS superelement eigen modes modes 1 through N (that is, between a specified beginning and ending time or frequency range) in a single solve step, instead of expanding a single mode at each solve step. Prestressed modal analysis with CMS superelements: The prestressed condition of a component structure can now be accounted for in the CMS superelement generation. Both fixed- and free-interface methods support the generation of prestressed CMS superelements. 4/22/2004

CMS Example Mechanical PART1 INTERFACE1 INTERFACE3 INTERFACE2 PART2 PART3 The 2D tuning fork is already broken up into three element components as shown. Three nodal components also exist that will be used to define the SuperElement interfaces. 4/22/2004

Mechanical CMS Generation Pass 4/22/2004

Mechanical CMS Generation Pass … 4/22/2004

Can Include Pre-stress Effects Mechanical CMS Use Pass Can Include Pre-stress Effects 4/22/2004

Mechanical CMS Use Pass … 4/22/2004

Mechanical CMS Expansion Pass 4/22/2004

Mechanical CMS Post-Processing 4/22/2004

CMS Fixed Versus Free Method Mechanical CMS Fixed Versus Free Method Table of modal frequency results Accuracy of CMS free interface method compared to CMS fixed interface method. 0.000 204.958 4 13,691.1 10,277.0 9,227.01 6,216.89 5,117.47 3,427.08 3,023.30 2,118.13 1,326.91 654.403 Full Model 0.023 13,694.3 14 0.012 10,278.2 13 0.009 9,227.88 12 0.007 6,216.90 6,217.32 11 0.003 5,117.63 10 0.001 3,427.13 9 0.002 3,023.36 8 2,118.16 7 6 5 CMS – Free CMS – Fixed Error (%) Frequencies (Hz) Modes 4/22/2004

PSD Analysis and Constant Material Damping Mechanical PSD Analysis and Constant Material Damping Equivalent Stress for PSD Analysis: The calculation of equivalent stress (SEQV) has been improved for random vibration (PSD) analyses using the Segalman-Reese algorithm. Principal stresses and stress intensity (S1, S2, S3, and SINT) are no longer available. Support is now available for full (ANTYPE,HARM and HROPT,FULL) and modal harmonic (ANTYPE,HARM and HROPT,MSUP) analyses when several materials, each having their own damping ratio that remains constant with respect to the excitation frequency, are present. An enhanced MP command supports the new capability. When constant damping ratios are specified (DMPRAT and MP,DMPR) in a frequency-response analysis, they are incorporated into the damping matrix automatically. Only the QR damped eigensolver (MODOPT,QRDA) supports the material-dependent constant damping ratio application in modal superposition harmonic analyses. Power Spectral Density (PSD) and Multi-Point Response Spectrum (MPRS) analyses do not support constant material damping for multiple materials 4/22/2004

Usability and Miscellaneous Mechanical Usability and Miscellaneous 4/22/2004

Post-Processing GUI Changes Mechanical Post-Processing GUI Changes 4/22/2004

Mechanical Usability Tabular loading: Tabular loads can now support loading as a function of X, Y or Z in a local coordinate system. The local coordinate system can be in the Cartesian, Cylindrical or Spherical coordinate system. When defining the table parameter, the coordinate system ID should also be specified (*DIM). Macro and command file error handling: If a macro or /INPUT (File > Read Input From) of a command file is executed in the wrong module, repeated warnings occur. (For example, warnings appear if you try to issue a PLNSOL command in /PREP7 because PLNSOL is not a valid command, abbreviation or macro in the preprecessor.) Upon encountering five such warnings, a dialog now appears allowing you to stop and exit the macro or /INPUT mode cleanly. You can modify the new behavior via a new /NERR command option. 4/22/2004

Other Enhancements Mechanical Heat Transfer PLANE55 -- A thickness option has been added for this element. This option is useful for applications (such as turbomachinery) where 2-D models need to be coupled with 3-D regions. SOLID87 -- An option (KEYOPT(5) = 1) has been added to use a consistent surface convection load matrix. The new option provides a more accurate solution on surfaces with large thermal gradients. 4/22/2004

Undocumented Features Mechanical Undocumented Features The following command is no longer documented and may be removed from ANSYS at a future date: GCGEN -- This command was valid only with the CONTAC48 and CONTAC49 elements, which are also no longer documented as of this release The following elements are no longer documented and may be removed from ANSYS at a future date: CONTACxx -- Old inputs using the following contact elements will continue to work, but you should update them to use the newer element: Undocumented Element Replace With CONTAC48 CONTA175 CONTAC49 CONTAC26 4/22/2004

Mechanical Solvers 4/22/2004

Solver Enhancements Mechanical DPCG and PCG solvers now support large deformation and strain (NLGEOM,ON command) when memory saving is activated (MSAVE,ON). The Lanczos eigensolver now supports modal analysis for elements using u-P formulation options: Constraint MPC184 element and the 180 series of new generation continuum elements which use u-P options. The u-P formulation elements can now be used in analysis types which use eigensolutions as a basis. These include modal superposition harmonics, modal superposition transient, and PSD analyses. Enhancements to memory and data handling, with the memory-saving option (MSAVE,ON) and PCG or DPCG solvers; The line search option (LNSRCH,ON) has been enhanced to handle contact and plasticity problems more efficiently; Resulting in overall savings of 10 percent in cumulative iterations for a run. Line searching itself is also faster, particularly for models using elements with extra shapes or enhanced strain formulations. 4/22/2004

ANSYS Multiphysics (Including ANSYS Emag & FLOTRAN CFD) V8.1 New Features 4/22/2004

Low Frequency Electromagnetics High Frequency Electromagnetics Multiphysics Multiphysics Topics Low Frequency Electromagnetics Electric Field Elements Current loading for SOLID117 High Frequency Electromagnetics Phased Array Antenna Analysis Multi-field Solver Speed & efficiency enhancements FLOTRAN Turbulence models Conjugate Heat Transfer 4/22/2004

Low Frequency Electromagnetics Multiphysics Low Frequency Electromagnetics V8.1 New Features 4/22/2004

New Electric Field Analysis Capabilities Multiphysics New Electric Field Analysis Capabilities Analysis Requirement: Many real world electric field applications use “lossy” (mildly conductive) dielectric materials and require a quasistatic electric analysis to simultaneously consider capacitive and conduction effects. New Features to Meet Requirement: Three new high-order electric elements, PLANE230, SOLID231, and SOLID232, are now available for a low frequency electric field analysis. The elements are applicable to steady-state electric conduction, time-harmonic and transient quasistatic electric field analyses. The electrostatic PLANE121, SOLID122 and SOLID123 elements have been enhanced to support a time-harmonic quasistatic analysis. Capability: You can now perform an electric field analysis that simultaneously takes into account the conduction and capacitive effects. The new and enhanced elements also allow you to transfer the calculated electric current and conduction or dielectric heating as sources for subsequent magnetic and thermal analyses respectively. 4/22/2004

New Electric Field Analysis Applications Multiphysics New Electric Field Analysis Applications General Applications: Lossy capacitors Microwave passive components (when full-wave analysis can be avoided) Transient effects in semiconductor devices High voltage insulators Charge injection devices Dielectric heating Particle detection Biotissue Medical Applications: Detection of malignant tissue Electric Impedance Tomography (EIT) Electromyography (EMG) – test muscle response to nervous (electric) stimulation Angiography – help locate and characterize atherosclerotic lesions Ablation – RF heating of cardiac tissue to cure rhythm disturbances 4/22/2004

New 23X Electric Field Elements Multiphysics New 23X Electric Field Elements PLANE230, SOLID231, SOLID232 High-order shape functions Material properties: resistivity - MP,RSVX (RSVY,RSVZ) permittivity - MP,PERX (PERY,PERZ) – valid for transient and harmonic analyses loss tangent - MP,LSST – valid for harmonic analysis only Reaction solution: electric current (AMPS) Analyses: static (steady-state current conduction analysis) transient (quasistatic) harmonic (quasistatic) Load transfer heat generation rate to a thermal analysis electric current to a magnetic analysis 4/22/2004

23X Elements – Input Summary Multiphysics 23X Elements – Input Summary Name PLANE230 SOLID231 SOLID232 2-D 8-node 3-D 20-node 3-D 10-node electric solid Geometry Product MP,EM,PP,ED DOF electric scalar potential (VOLT) Reaction total (conduction + displacement) electric current (AMPS) Material Properties RSVX, RSVY, PERX, PERY, LSST RSVZ, PERZ KEYOPT(3) 0 - Plane 1-Axisymmetric 4/22/2004

Enhanced 12X Electrostatic Elements Multiphysics Enhanced 12X Electrostatic Elements Enhancements in red italic text! PLANE121, SOLID122, SOLID123 High-order shape functions Material properties: relative permittivity – MP,PERX (PERY,PERZ) loss tangent - MP,LSST – valid for harmonic analysis only resistivity - MP,RSVX (RSVY,RSVZ) – valid for harmonic analysis only Reaction solution: electric charge (CHRG) Analyses: static harmonic (quasistatic) Load transfer electrostatic forces to a structural analysis heat generation rate to a thermal analysis total current to a magnetic analysis 4/22/2004

12X Elements – Input Summary Multiphysics 12X Elements – Input Summary 3-D 10-node 3-D 20-node 2-D 8-node Name electrostatic solid SOLID123 SOLID122 PLANE121 0 – basic printout, 1 – basic solution at int. pts, 2 – nodal field printout KEYOPT(5) 0 - CS parallel to global, 1 - CS based on the I-J side KEYOPT(4) 0 - Plane 1-Axisymmetric KEYOPT(3) RSVZ, PERZ RSVX, RSVY, PERX, PERY, LSST Material Properties electric charge current (CHRG) Reaction electric scalar potential (VOLT) DOF MP,EM,PP,ED Product Geometry 4/22/2004

23X Elements – GUI Menu path: Multiphysics PLANE230, SOLID231, SOLID232 added to Library of Element Types as Electric Conduction elements Menu path: Main Menu>Preprocessor>Element Type>Add/Edit/Delete 4/22/2004

23X,12X Elements – ANTYPE GUI Multiphysics 23X,12X Elements – ANTYPE GUI PLANE230, SOLID231, SOLID232 support steady-state, harmonic, and transient analyses PLANE121, SOLID122, SOLID123 support static and harmonic analyses Menu Paths: Main Menu>Preprocessor>Loads>Analysis Type>New Analysis Main Menu>Solution>Analysis Type>New Analysis 4/22/2004

Electromagnetics Analysis Elements Multiphysics Electromagnetics Analysis Elements Emag Analysis Class Product Material Properties Multiphysics Dielectric Electric conduction Dielectric losses Magnetic Static or Steady-state Y Plane121 Solid122 Solid123 (VOLT-CHRG) Plane230,Solid231,Solid232 (VOLT-AMPS) Thermo-electric elements (VOLT-TEMP) Solid5,Solid98,Solid96 (MAG-FLUX) Plane13,Plane53,Solid97 Solid117 (AX,AY,AZ – CSGX,CSGY,CSGZ) LF Emag Harmonic Transient Harmonic analysis Plane121,Solid122,Solid123 Plane13,Plane53,Solid97,Solid117 (AX,AY,AZ – CSGX,CSGY,CSGZ VOLT – AMPS) Transient & Harmonic analysis: HF Emag Modal N HF118, HF119, HF120 (AX – CSGX) 4/22/2004

Example steady state electric field analysis Multiphysics Example steady state electric field analysis A current I is applied at two point electrodes (e) on a thin conducting disk as shown in the figure: Problem parameters: disk radius 20 cm point electrode separation 20 cm current I=1 mA disk resistivity =100 *m Analysis requirement: Find the potential and dc-current distributions in the disk FEA Model: Triangular PLANE230 electric elements 23,789 nodes, 11766 elements I e 4/22/2004

Steady-State Electric Analysis - Results Multiphysics Steady-State Electric Analysis - Results Electric potential (VOLT) distribution Electric current density (JC) distribution 4/22/2004

Example Transient Electric Field Analysis Multiphysics Example Transient Electric Field Analysis Problem Description: A capacitor has 2 separate layers of lossy dielectric materials between its plates. Dielectric material 1: 1cm thick, εr = 2, ρ= 2E8 Dielectric material 2: 2 cm thick, εr =4, ρ= 8E8 A 1V potential is applied across the electrodes over a 1ms period of time FEA Model: 2D triangular mesh of PLANE230 electric field elements. Electrodes are left and right hand boundaries of mesh Analysis Objective: Determine time-varying results for: Voltage (VOLT) Conduction current density (JC) Electric field strength (EF) 5 cm 1 cm 2 cm 4/22/2004

Transient Electric Field Analysis Results Multiphysics Transient Electric Field Analysis Results Time varying contours of voltage Time varying vectors of electric field strength EF Note: As the charge accumulates on material interface, the voltage gradient across more conductive material on left diminishes. 4/22/2004

Transient Electric Field Analysis Results Multiphysics Transient Electric Field Analysis Results Comparison of analytical and ANSYS computed results: 4/22/2004

New SOURC36 Capability Multiphysics Analysis Requirement: Prior to release 8.1, SOURC36 “meshless” current source primitives could only be used in combination with magnetic scalar potential (MSP) elements (SOLID5, SOLID96, SOLID98). Enhancement: SOURC36 may now serve as a current source for the 3D edge flux potential elements (SOLID117) This capability applies to 3-D static analyses only. Benefit: Easy to use, more efficient coil analysis when using SOLID117 elements. The underlying region can be meshed separately from the coils, and the coils described conveniently with SOURC36 primitives. Solenoidal conditions are automatically satisfied. The current can be input to SOLID117 elements via the CUR real constant on SOURC36, much easier than the alternative method involving manually defining body loads on each element. 4/22/2004

SOURC36 Analysis Example Multiphysics SOURC36 Analysis Example Quarter symmetry model of solenoid using source36 for coil: yoke SOURC36 coil primitive Space in which coil resides armature 4/22/2004

SOURC36 Analysis Example Multiphysics SOURC36 Analysis Example Quarter symmetry model of solenoid magnetic flux density (vectors) results using source36 for coil: 4/22/2004

High Frequency Electromagnetics Multiphysics High Frequency Electromagnetics V8.1 New Features 4/22/2004

New Phased Array Capability Multiphysics New Phased Array Capability Analysis Requirement: Many real world HF antenna’s consist of geometric arrays of smaller identical antenna’s with different transmit phases. This approach improves antenna sensitivity, and also allows dynamic control over the antenna directional properties. New Features to Meet Requirement: High-frequency electromagnetic elements (HF119, HF120) support periodic boundary conditions Uses Floquet’s periodic principle to allow phased array antenna analyses. Uses far field extension to compute radiation pattern and directive gain of array. Benefit: Drastic reduction in problem size and resulting increase in solution speed. Ability to solve class of antenna radiation problems previously beyond our scope! 4/22/2004

Phased Array Analysis Example Multiphysics Phased Array Analysis Example Antenna consisting of 25 X 25 array and single cell modeled 4/22/2004

Antenna directive gain for single cell & full 25 X 25 array Multiphysics Phased Array Results Antenna directive gain for single cell & full 25 X 25 array 4/22/2004

Animation of Y component of electric field for single array cell Multiphysics Phased Array Results Animation of Y component of electric field for single array cell 4/22/2004

Multiphysics Multi-field Solver V8.1 New Features 4/22/2004

Multi-field Solver Enhancements Multiphysics Multi-field Solver Enhancements Enhanced Feature: The following enhancements have been made to the dissimilar mesh mapping aspects of the Multi-field solver: Mapping information can be saved to a file for a later restart so that costly mapping calculations do not have to be repeated, especially for volumetric load transfer. The mapping calculation can occur before issuing the SOLVE command (i.e. in /PREP7 or /SOLU). Mapping diagnostics are improved for curved geometry. The bucket search algorithm is more robust than the global search algorithm, and is now the default algorithm for mapping. Benefits: Overall increase in solution speed and efficiency of the Multi-field solver. Solution speed gains of up to 17% have been measured on three field problems. Largest gains can be expected for applications coupling more fields with greater differences between each field’s meshes, such as Fluid-solid interaction and RF-thermal heating. 4/22/2004

FLOTRAN Turbulence Models & Conjugate Heat Transfer Multiphysics FLOTRAN Turbulence Models & Conjugate Heat Transfer V8.1 New Features 4/22/2004

FLOTRAN Heat Transfer Enhancements Multiphysics FLOTRAN Heat Transfer Enhancements New Features: Two new turbulence models have been added to FLOTRAN k-ω Model Shear Stress Transport (SST) Model Applicable to FLUID141 and FLUID142 Elements: Benefits: FLOTRAN now has improved solution accuracy for heat transfer under turbulent conditions: When the turbulence boundary layer is not well-resolved, a thermal stabilization procedure can be invoked to alleviate temperature-oscillations near walls. When the turbulent boundary layer is well-resolved, new k-ω and SST turbulence models can be invoked to predict turbulent heat transfer in the presence of adverse pressure gradients. The SST model combines the advantages of both the k-ε model and the k-ω models. Using a blending function, the SST model activates the k- ω model near walls and the k-e model far away from the walls. 4/22/2004

FLOTRAN Heat Transfer Example Multiphysics FLOTRAN Heat Transfer Example Conjugate Heat Transfer problem involving turbulent flow through a 90 degree bend. Fluid tetrahedral mesh shown below: Inlet Velocity 0.5 m/sec Inlet Temperature 333K Outlet Condition P = 0 4/22/2004

FLOTRAN Heat Transfer – Example Multiphysics FLOTRAN Heat Transfer – Example Fluid temperature results or SST turbulence model. 4/22/2004

FLOTRAN SST Model versus K-Epsilon Multiphysics FLOTRAN SST Model versus K-Epsilon Detail of recirculation zone, Fluid velocity vectors. SST model accurately predicts secondary recirculation zone. K-Epsilon does not. SST Turbulence Model K-Epsilon Turbulence Model 4/22/2004

FLOTRAN SST Model versus K-Epsilon Multiphysics FLOTRAN SST Model versus K-Epsilon Detail of recirculation zone, Fluid temperature. SST model MATCHES experimental results in secondary recirculation zone. K-Epsilon does not.   SST Turbulence Model K-Epsilon Turbulence Model 4/22/2004

Workbench ANSYS Workbench V8.1 New Features 4/22/2004

ANSYS Workbench V8.1 New Features Workbench Start-up ANSYS Workbench V8.1 New Features 4/22/2004

Direct Access to Workbench Windows Workbench Start Page Improved Ease of Use Direct Access to Workbench Windows Project Page Available for Managing Files Geometry Accessed from Simulation Window Active CAD Systems Files 4/22/2004

Workbench Options Menu Global Workbench Options Control Common Settings for All Applications Unique Preferences That are Application Specific 4/22/2004

Workbench Options Menu Mouse View Control Settings Set Same as CAD Systems Unique Preferences View Operations Supported Rotate Pan Zoom Box Zoom 4/22/2004

New communication method that does not involve SPAM. Workbench Communication New communication method that does not involve SPAM. Can Provide Support Updates for: Service Packs Training Tips & Tricks FAQ’s RSS News Headlines ANSYS Corporate Local Support News 4/22/2004

ANSYS Workbench V8.1 New Features Non-Linear Materials ANSYS Workbench V8.1 New Features 4/22/2004

Bilinear Stress-Strain Bilinear Isotropic Hardening Model Specify: Workbench Nonlinear Materials Bilinear Stress-Strain Bilinear Isotropic Hardening Model Specify: Yield Stress Tangent Modulus 4/22/2004

Multilinear Stress-Strain Multilinear Isotropic Hardening Model Workbench Nonlinear Materials Multilinear Stress-Strain Multilinear Isotropic Hardening Model Specify: Tabular entry of stress-strain data. 4/22/2004

Solution Feedback and Results Workbench Solution Feedback and Results ANSYS Workbench V8.1 New Features 4/22/2004

Solution Output Object Force Max DOF Increment Line Search Value Workbench Convergence History Solution Output Object Force Max DOF Increment Line Search Value Time Increment 4/22/2004

Provides displacement or contact result plots. Workbench Result Tracker Provides displacement or contact result plots. Return Newton-Raphson residual forces Helps in determining the cause of convergence failures in nonlinear analyses. 4/22/2004

Directional Deformations (x, y, z) Contact Workbench Result Tracker Types Directional Deformations (x, y, z) Contact Number Contacting Number Sticking Pressure Penetration Gap Frictional Stress Sliding Distance Chattering Elastic Slip Normal Stiffness Max Tangential Stiffness Min Tangential Stiffness Resulting Pinball 4/22/2004

A Contact Tool object can be added to a Solution folder Workbench Contact Result Tool A Contact Tool object can be added to a Solution folder Allows users to conveniently scope contact results to a common selection of geometry or contact regions. 4/22/2004

Contact Tool - Reactions Workbench Contact Tool - Reactions Reactions for all contact pairs are summarized in the worksheet view. 4/22/2004

Workbench Command Objects Users familiar with ANSYS commands and APDL programming can now enter commands directly Commands objects. After inserting a Commands object at the Environment or Solution level, the Worksheet tab transforms to a text editing window for entering the commands. 4/22/2004

Multiple instances are allowed Workbench Command Objects Multiple instances are allowed Command objects can be exported or inserted Parametric output back to WB 4/22/2004

ANSYS Workbench V8.1 New Features Meshing ANSYS Workbench V8.1 New Features 4/22/2004

Mesh Refinement Control Workbench Mesh Refinement Control Sphere of Influence Applied to a face Anchored to a user defined coordinate system Sphere of Influence Applied to a vertex 4/22/2004

Tri / Surface Meshing Algorithms Workbench Tri / Surface Meshing Algorithms Better Transitions in 3D Advancing Front Improved Point Placement for Delaunay 4/22/2004

Automatic Contact Sizing Workbench Automatic Contact Sizing With Contact Sizing No Contact Sizing 4/22/2004

Automatic Contact Sizing Workbench Automatic Contact Sizing 4/22/2004

Drag’n’Drop contact regions from “Contact Folder” to “Mesh Folder” Workbench Contact Size Mesh Drag’n’Drop contact regions from “Contact Folder” to “Mesh Folder” Absolute (default) or Relative Sizing Options 4/22/2004

Performs Edge proximity pre-refinement for non-swept models Workbench Proximity Control Performs Edge proximity pre-refinement for non-swept models May increase model size With Proximity Without Proximity 4/22/2004

ANSYS Workbench V8.1 New Features CAD Integration ANSYS Workbench V8.1 New Features 4/22/2004

Pro/ENGINEER Wildfire Autodesk Inventor 8 Workbench CAD System Updates Catia V5 R12 UG NX2 Pro/ENGINEER Wildfire Autodesk Inventor 8 Autodesk Mechanical Desktop 2004 DX SolidWorks 2004 Solid Edge 15 Parasolid 15.1 ACIS R12 4/22/2004

Attach and Update a model that is open in ProEngineer from Intralink Workbench CAD Integration Smart Updates Speed up the assembly update by updating only components that have been modified Implemented for Unigraphics and Autodesk Inventor A user preference to turn on Smart Update is available in Start Page under Advanced Geometry Preferences and the Geometry node details view Attach and Update a model that is open in ProEngineer from Intralink 4/22/2004

ANSYS Workbench V8.1 New Features Remote Solutions ANSYS Workbench V8.1 New Features 4/22/2004

Overview - Remote Solving Workbench Overview - Remote Solving Can be used on the client machine Allows work in other branches while solving locally Can use LSF to solve remotely Servers LSF Localhost CE (Beta) – will allow remote solving without LSF Submission WB shutdown or switch allowed Retrieval of queued jobs later in time Numerous GUI changes for Preview 3 4/22/2004

Can solve on local machine, LSF cluster or UNIX server Workbench Remote Solving Can solve on local machine, LSF cluster or UNIX server Each Solution can be sent to a different server Analysis license can be selected 4/22/2004

Each remote option has defaults in the Options dialog Workbench Remote Solving Each remote option has defaults in the Options dialog 4/22/2004

The status page shows all submitted jobs Workbench Remote Solving The status page shows all submitted jobs 4/22/2004

Miscellaneous Simulation Features Workbench Miscellaneous Simulation Features ANSYS Workbench V8.1 New Features 4/22/2004

Pretension Application Types: Workbench Pretension Bolt Loads Pretension Application Types: Load (force) Adjustment (length, number of threads) Introduced at v8.0 as a Mechanical feature. Now Enabled by DesignSpace Load Adjustment 4/22/2004

Miscellaneous Enhancements Workbench Miscellaneous Enhancements Right Mouse Button rename contact, results, etc. Users can change the default name of a contact region to match corresponding descriptive names for items in the Geometry branch of the tree that make up the contact region. Clicking the right mouse button on a contact region and choosing Rename Based on Geometry in the context menu changes the name of that contact region. Clicking the right mouse button on the Contact branch and choosing the same option changes the names of all contact regions under the branch. Configurable contact worksheet When viewing a worksheet of a Contact folder or a Contact Reactions item, users now have the ability to select which columns to display in the worksheet table. The choice is made in a context menu through a right mouse button click inside the worksheet table. 4/22/2004

Miscellaneous Enhancements Workbench Miscellaneous Enhancements Right Mouse Button flip contact target and contact For asymmetric contact, a useful enhancement at this release is the ability to flip contact and target faces or edges in a contact region. This feature is available through a right mouse click on the contact region and choice of the Flip Contact/Target context menu item. All contact and target items displayed under Scope in the Details View are reversed. Point mass Users can apply a Point Mass to the model from the Geometry object. The location of a point mass can be anywhere in space and it can be defined in a local coordinate system. 4/22/2004

Miscellaneous Enhancements Workbench Miscellaneous Enhancements Loads in local coordinate system Forces, remote forces, bearing loads, moments and given displacements can now be defined in a local coordinate system. With this capability, users no longer need to transform the loads and given displacements into the global coordinate system manually. When any of these loads or given displacements are defined by components in the Details View, a new drop down menu is available from which users select a specific coordinate system to be applied. Contact results in solution combinations A Contact Tool object can now be added to a Solution or Solution Combination folder that allows users to conveniently scope contact results to a common selection of geometry or contact regions. Using a Contact Tool, all possible contact results can be investigated at one time for a given scoping. 4/22/2004

Geometry - DesignModeler Workbench Geometry - DesignModeler ANSYS Workbench V8.1 New Features 4/22/2004

DM - Multiple Treeview Selection Workbench DM - Multiple Treeview Selection You can now select multiple items in the feature tree. This allows you to perform operations on several items at once. For example: Suppress, unsuppress, and delete multiple features at once Hide and suppress multiple bodies at once 4/22/2004

Cross Section Improvements Workbench Cross Section Improvements Several new options make aligning and assigning cross sections easier and more flexible. Automatic alignment in global +Y direction For unaligned edges, DM aligns the edge in the global +Y direction if the default global +Z direction is invalid Additional angle option Rotate property rotates the alignment vector around the edge by the specified angle 4/22/2004

Cross Section Improvements (cont) Workbench Cross Section Improvements (cont) Edge reversal The Reverse Orientation property allows you to define the edge alignment with respect to the opposite endpoint Direction Arrow New direction arrow shows alignment direction when specifying the cross section alignment 4/22/2004

Cross Section Improvements (cont) Workbench Cross Section Improvements (cont) Improved Display Options The cross section alignment arrows and solid representation can now be shown together 4/22/2004

Cross Section Improvements (cont) Workbench Cross Section Improvements (cont) Easier Cross Section Assignment The cross sections are now assigned to line bodies through a combo box property Vector Alignment for Cross Sections Cross section alignment may also be specified by entering vector coordinates 4/22/2004

Automatic Dimension Moving Workbench Automatic Dimension Moving Now, dimensions will move with the edges they measure. In the following picture, if dimension V2 is increased, then dimension H1 will automatically move up with the top edge of the rectangle. Automatic movement can be turned on or off from the dimension’s Details Box. 4/22/2004

Workbench Surface Extension The Surface Extension feature extends surfaces to fill gaps in between bodies. Surfaces can be extended by a fixed distance or up to a bounding set of faces. 4/22/2004

Useful for CFD and Emag applications. Workbench Fill Feature The Fill feature will create a new frozen body to fill the space occupied by a hole or cavity. Useful for CFD and Emag applications. 4/22/2004

Surfaces From Sketches Feature Workbench Surfaces From Sketches Feature Surfaces From Sketches allows you to quickly and easily create surfaces directly from sketch profiles. 4/22/2004

New Import options allow greater control over imported geometry. Workbench Import Options New Import options allow greater control over imported geometry. The Process property allows body filtering, while geometry healing options help clean up poor geometry. 4/22/2004

Planar bodies are flat surface bodies that lie in the XYPlane. Workbench Planar Bodies Planar bodies are flat surface bodies that lie in the XYPlane. They can be sent to the Simulation tab for 2D analysis. Planar bodies have a slightly different icon than other surface bodies in the Tree View’s body list. 4/22/2004

More Modeling Improvements Workbench More Modeling Improvements Body Operation: Keep Option You can choose to keep the selected bodies that are used in a Boolean operation Multiple Surface Support for Joint Any number of surfaces can be selected to join in a single Joint feature Point Profiles for Skin/Loft The Skin/Loft feature now accepts point profiles as the start and/or end profile. Point Feature by Coordinates Points can be created from scratch by reading in coordinates from a data file. 4/22/2004

More Modeling Improvements Workbench More Modeling Improvements Arc Center Alignment for Plane Feature Now you can choose to position the plane origin at the center of an arc on the boundary of the base face No Save Required for Parameter Manager You no longer need to save the model in order to begin using the parameter manager Plane origin is placed at the center of this arc 4/22/2004

ANSYS Workbench V8.1 New Features Beta Features ANSYS Workbench V8.1 New Features 4/22/2004

First surface picked is master or HiSector Workbench Mesh Matching (Beta) Works for tet meshes only – not needed for sweeping. No support for Hex Dominant First surface picked is master or HiSector Need a coordinate system to define sector Topology must match exactly 4/22/2004

Workbench Mesh Matching (Beta) 4/22/2004

Workbench Plane Stress (Beta) 4/22/2004

Workbench Axisymmetric (Beta) 4/22/2004

Beam Stress (Beta) Direct Min Bending Max Bending Min Combined Workbench Beam Stress (Beta) Direct Min Bending Max Bending Min Combined Max Combined 4/22/2004

Low Frequency Electromagnetics Simulation Beta Features Workbench Low Frequency Electromagnetics Simulation Beta Features ANSYS Workbench V8.1 New Features 4/22/2004

Objectives - WB LF Emag Objectives: Workbench Objectives - WB LF Emag Objectives: Provide full featured low frequency electromagnetics analysis capability in WorkBench. Accessed with ANSYS Emag (core or enabled task) or ANSYS Multiphysics license key. DM Enclosure for creation of “field” volume released at 8.0 Magnetostatics beta release ANSYS 8.1 Magnetostatics commercial release target ANSYS 9.0 Electrostatics and other LF electromagnetics capabilities will follow. 4/22/2004

WB LF Emag 8.1 Beta Features Workbench WB LF Emag 8.1 Beta Features Model setup with SOLID117 Air, iron (Keyopt(1)=0) Solid conductor (Solenoidal formulation: Keyopt(1)=5) Enclosure body automatically assigned AIR material Emag unit conversions Conductor Object with Voltage and Current Loading Flux-parallel boundary condition Materials: Relative permittivity, resistivity Results request: B, H, F Solution: Will solve a linear magnetostatics problem Raster/Vector display option in Details View. 4/22/2004

WB LF Emag: Material Properties Workbench WB LF Emag: Material Properties Click mouse for zoom 4/22/2004

LF Emag Environment: Conductor Workbench LF Emag Environment: Conductor Conductor object: Identifies conductors for load application, inductance, and postprocessing. Supports solid conductors now for loads. Will support stranded conductors as well at 9.0. Loading: Tagged to Conductor. Supports voltage and current loading for solid conductor. Will support current loading for stranded conductors Click mouse for detail 4/22/2004

LF Emag Solution: Displayed Results Workbench LF Emag Solution: Displayed Results 4/22/2004

LF Emag: Vector & Contour Plots Workbench LF Emag: Vector & Contour Plots Vector / Contour is selected in the Solution objects “Definition” 4/22/2004

Release 8.0 Beta features, plus: Support stranded coils (SOURC36) Workbench WB LF Emag 9.0 Features Release 8.0 Beta features, plus: Support stranded coils (SOURC36) Support permanent magnets Winding editor for machines (via SOURC36) BH curve library Automated electromagnetic Force & Torque extraction tools. Automated Inductance tool Parameter sweep displacement vs. force, torque or inductance 4/22/2004

Optimization - DesignXplorer ANSYS Workbench V8.1 New Features 4/22/2004

DesignXplorer VT 8.1 Update Topology Errors Independent Soluton Type Bonded MPC Contact Analysis in DesignXplorer VT Revised User Interface Design For Six Sigma Questions and Answers 4/22/2004

DesignXplorer VT 8.1 Update Topology Errors -- Topology Errors shows the topology changes that have caused DX VT to cut parameter ranges or fail to generate a solution 4/22/2004

DesignXplorer VT 8.1 Update Independent Soluton Type -- Workbench now supports the Independent Solution Type which evaluates the derivatives assuming that the input variables are independent. This option is recommended when you have more than 7 geometric parameters. 4/22/2004

DesignXplorer VT 8.1 Update Bonded MPC Contact Analysis in DX VT -- DesignXplorer VT now supports bonded MPC contact analysis for Surface-to-Surface Contact* * - ANSYS 8.1 Service Pack #1 4/22/2004

DesignXplorer VT 8.1 Update Revised User Interface -- DesignXplorer features a re-design of the user interface, intended to simplify and streamline the process of creating and accessing data. View Selector View Sub Options View Details 4/22/2004

DesignXplorer VT 8.1 Update Design for Six Sigma Analysis -- Design for Six Sigma is a technique that determines the extent to which uncertainties with respect to input parameters affect the finite element analysis results 4/22/2004

DesignXplorer VT 8.1 Update Design for Six Sigma Analysis – Input Distributions 4/22/2004

DesignXplorer VT 8.1 Update Design for Six Sigma Analysis – Output; Histograms, Probability Tables 4/22/2004

DesignXplorer VT 8.1 Update Design for Six Sigma Analysis – Output; CDF, Probability Tables 4/22/2004

Parallel Performance for ANSYS ANSYS Incorporated © 2004 ANSYS, Inc. ANSYS, Inc. Proprietary

Parallel Performance for ANSYS Where is PPFA of the most benefit? Any existing ANSYS customer with: Processing large linear models faster  Processing models that would not fit into the available hardware. (On four 32-bit machines, you can solve over 6 MDOF!) Processing long running nonlinear analyses that can be solved by the PCG solver*  Processing jobs as fast as possible.  Here the need is just shear throughput.  * Sparse is under development for 9.0 4/22/2004

Parallel Performance for ANSYS Where is PPFA of the most benefit? Any existing customer interested in: Quicker turnaround time (Factors up to 6.5x for 8 machines) 4/22/2004

Parallel Performance for ANSYS The Distributed Solution for ANSYS: Parallel Performance for ANSYS Add-on Module containing 4 solvers Distributed Preconditioned Conjugate Gradient (DPCG) New at 8.0!!!! Distributed Jacobi Conjugate Gradient (DJCG) Distributed Domain Solver (DDS) Algebraic Multi-Grid Solver (AMG) Works with a variety operating systems* Intel IA-32 Linux Intel IA-64 Linux Intel IA-32 Windows Intel IA-64 Windows Wide variety of Unix: HP, IBM, SGI, Sun * - Only homogenous clusters allowed 4/22/2004

Parallel Performance for ANSYS Memory Management at 8.1 More efficient memory management in general Distributed PCG (DPCG) solver now supports the memory saving feature (MSAVE command) which uses an element-by-element approach for the stiffness matrix For elements Solid92, Solid95, Solid186 or Solid187 4/22/2004

Parallel Performance for ANSYS Memory Management at 8.1 How much memory is required? Machine #1 must contain its workload and the entire preconditioner Machines #2 through N only need their individual workload 4/22/2004

Parallel Performance for ANSYS How much memory is required? For the Machine #1: For Machines #2 through N: Where: C = 1.0 for MSAVE,Off = 0.7 for Solid95 or Solid186 with MSAVE, ON = 0.5 for Solid92 or Solid187 with MSAVE, ON Machine(1) Memory(Gb) MDOF(Maximum) = ------------------------------------------ (0.1 + C / Number of Machines) Machines(2 – N) Memory(Gb) * N MDOF(Maximum) = ----------------------------------------- C 4/22/2004

Parallel Performance for ANSYS How much memory is required? Example 1 for the Machine #1: 32 bit PC’s with 1 Gb RAM Each 8 Machines in Total Solid92 or Solid187 models 1 (Gb) MDOF Machine #1 (Maximum) = ------------------ (0.1 + 0.5 / 8) = 6.15 MDOF!!!! 4/22/2004

Parallel Performance for ANSYS How much memory is required? Example 2 for the Machine #1: 32 bit PC’s with 2.2 Gb RAM Available (with the /3 Gb switch) Total of 4 Machines in the Cluster MSAVE not possible 2.2 (Gb) MDOF Machine #1 (Maximum) = ------------------ (0.1 + 1 / 4) = 6.3 MDOF!!!! 4/22/2004