2A Suite of CFD SolversFluent provides a suite of computational fluid dynamics (CFD) solvers:FLUENT (4.5 & 5) NEKTONFIDAP IcePakPOLYFLOW MixSimAll are software packages for modeling processes involving:Fluid flowHeat transferMass transfer and chemical reactionsRelated phenomenaThey differ in the solver technology used and the industrial applications on which they are focused.
3Why Multiple Solver Technologies? Each CFD solution method performs best on a specific group of applications.As a result, distinct solver algorithms are needed to optimize speed, robustness, and accuracy on different applications.Fluent Inc. pursues multiple solver technologies in order to meet the diverse needs of our users.Recently, we have also developed products with capabilities and user interfaces that are tightly focused on specific industries/applications (e.g., IcePak and MixSim).
4FLUENT 4.5 and FLUENT 5 FLUENT 5: FLUENT 5 integrates FLUENT/UNS and RAMPANTSegregated-implicit, coupled-explicit/implicit FVM solver optionsComplete mesh flexibilityUnstructured quad/hex, tri/tet, or hybrid meshes with solution-based mesh adaptionFLUENT 4.5:Pressure-based, segregated, finite volume methodStructured quad/hex meshesContains some models which have not yet been ported to FLUENT 5Eulerian-Eulerian multiphase flow modelDeforming mesh
5FLUENT 5 Ideally suited for: Typical applications include: Compressible and incompressible flowsAble to handle full range of Mach numbers in single solution domainFlows involving complex geometries and complex physicsTypical applications include:Automotive external aerodynamics High-speed aerodynamicsUnderhood flows Compressible nozzle flowFans, Pumps, Burners, Furnaces TurbomachineryReactor Vessels, Heat Exchangers Internal rocket motor flows
6FLUENT 5: Flow in a Cooling Jacket Surface pressure distribution in an automotive engine cooling jacket
9FLUENT 4.5: Multiphase Flow in a Riser Instantaneous solids concentration in a riser, which is a pneumatic solids conveying device. Porous media (simulating a perforated plate) at the top of the domain distributes the flow and produces uniform delivery of catalyst (solids) to the reactor.
10FIDAP Fully coupled or segregated finite element method Ideally suited for:Incompressible and mildly compressible flowsFlows involving complex geometries and physicsComplete mesh flexibility:Unstructured quad/hex, tri/tet, or hybrid meshesSolver of choice for applications involving turbulence, “stiff” chemistry, free surfaces, phase change, and shear dependent viscosityTypical applications include:Biomedical flowsSemiconductor flows: CVD, crystal growth, electroplatingMetal casting, solidification, and extrusionExtruders, complex die flows
11FIDAP: Flow in a Blood Pump Velocity vectors and pressure distribution inside a blood pump.
12FIDAP: Crystal GrowthFlow pattern and melt interface during crystal growth using the Bridgman technique
13POLYFLOW Fully-coupled and segregated finite element methods Ideally suited for laminar, viscous flows involving:Complex rheology (including viscoelasticity)Free surfacesMesh flexibility:Unstructured quad/hex, tri/tet, or hybrid meshes, wedge elementsSolver of choice for polymer processing and related applications such as:Extrusion, coextrusion, die designBlow molding, thermoformingFilm casting, glass sheet forming/stretching, fiber drawingChemical reactions, foamingViscoelastic flows (“memory effects”)
14POLYFLOW: “Inverse” Die Design Given desired part shape, POLYFLOW determines necessary die lip geometry.desired partdie lip (calculated)Requested part shape and calculated die lip shape for a rubber car door seal.extrusion direction
15POLYFLOW: Blow Molding Uses 3D shell elementsSimulation of:Parison extrusionPinch-offInflationCoolingPrediction of thickness distributionPrediction of extrudate swelling due to:Stress relaxationOther elastic effectsInitial configurationBlow molding simulation of a gas tank using the membrane elementFinal thickness profile
16NEKTON Variable-order finite element method (spectral element method) Ideally suited for laminar, viscous flows with free surfacesUnstructured quad/hex meshes with solution-based polynomial adaption (2D)Linear stability analysis for coating applicationsSolver of choice for thin film coating flows such as:Slide, slot, roll, curtain, and blade coatingMulti-layer coatingsDeforming boundaries (rubber-backed rolls, compressible substrates)
17NEKTON: Coating Flow Analysis Template-based problem solving: base solution can be parameterized to quickly study changes in:Properties, e.g.,DensityViscositySurface tensionBoundary conditions, e.g.,Flow ratesWeb speedVacuumGeometry, e.g.,Slide angleGap
18NEKTON: Template Example 2. You can make changes in one panel:1. Initial solution for slide coater3. Web angle is automatically changedsignificant savings in problem setup and solution time
19IcePakIcePak is focused on electronics cooling design:Cooling airflow, heat conduction, convection and radiation heat transferThe user interface and automatic meshing are tailored for applications such as:Cabinet designFan placementBoard-level designHeat sink evaluationFlow pathlines and temperature distribution in a fan-cooled computer cabinet.
20MixSimMixSim is a specialized user interface that allows quick and easy set-up of mixing tank simulations.The tank size, bottom shape, baffle configuration, number and type of impellers, etc. are specified directly.The mesh and complete problem definition are then automatically created.Other features include:Impeller libraries from leading equipment manufacturersTransient sliding mesh, steady-state multiple reference frame modelsNon-Newtonian rheology
22Overall Code Structure Geometries and meshes can be imported from other CAE packages.GAMBITTGriddirect inputFLUENT 4.5, FLUENT 5, NEKTONimportexportimportexportFIDAPPOLYFLOWmodel fileresults fileresults filedata filecase filedata fileData can be exported to other CAE packages for postprocessing.
24SummaryAs your applications for CFD expand, you can benefit from our multiple solver technology.Our goal is to provide the appropriate (best) solver for each application.Development of a common interface will allow you to more easily take advantage of different solvers.