PHOENICS 2006 December PHOENICS Today Computer Simulation of Fluid Flow, Heat Flow, Chemical Reactions and Stress in Solids. PHOENICS Today PHOENICS 2006 December

Contents PHOENICS Today This presentation shows some of the new features in PHOENICS 2006 The talk is in four parts: Pre-processor (VR-Editor) Post-processor (VR-Viewer) Solver (Earth) General improvements (common to all modules) Special Purpose versions

VR Editor Improvements PHOENICS Today An auto meshing feature has been added. For most cases the Editor will generate a reasonable grid with little or no user input. The grid distribution is based on a maximum cell size (as a fraction of the domain size), and a maximum change in cell size across region boundaries.

VR Editor Improvements PHOENICS Today The default grid can then be easily refined

VR Editor Improvements PHOENICS Today The treatment of Polar geometries has been significantly updated. As a reminder, in polar co-ordinates X is θ, the angle (in radians!) Y is r, the radius Z is z, the axial distance.

VR Editor Improvements PHOENICS Today For objects using the default 'polcu' geometries, the size is set in (dθ,dr,dz) and position in (θ,r,z) as before. For non-'polcu' geometries, including STL imports, the size is in Cartesian (dx,dy,dz), but position is still in (θ,r,z).

VR Editor Improvements PHOENICS Today As the Cartesian size is used, the shape and size of the object are preserved with no distortion.

VR Editor Improvements PHOENICS Today This allows us to use more suitable grids…

VR Editor Improvements PHOENICS Today The treatment of INLET objects in Polar co-ordinates has been improved. The inflow can now be specified as: Cartesian velocity components Polar (grid-directed) velocity components Volumetric flow rate Mass flow rate

VR Editor Improvements PHOENICS Today

VR Editor Improvements PHOENICS Today The 'Slide velocity' can be set for blockages as well as for plates. By setting the surface velocity, a range of cases involving steady movement can be treated as steady-state.

VR Editor Improvements PHOENICS Today In Cartesian co-ordinates, the 'Spin' option sets the surface velocity as if the object were rotating about its axis.

VR Editor Improvements PHOENICS Today In Polar co-ordinates , the slide velocity can be in m/s or radians/s.

VR Editor Improvements PHOENICS Today Heat-transfer between the blockage and the surrounding fluid is controlled by the blockage external heat-transfer coefficient. By default, this is obtained from the wall-functions. Alternatively, a user-set constant value can be supplied.

VR Editor Improvements PHOENICS Today A new object type TRANSFER has been introduced. It allows the outflow from one solution to be used as the inflow to another.

VR Editor Improvements PHOENICS Today INLET and OUTLET objects can also be ‘tagged’ to act as Import or Export TRANSFER objects Only the shape of the Import/Export object needs to be the same between runs – the grid does not need to be identical The data to be transferred is held in an ASCII text file

VR Editor Improvements PHOENICS Today The new object types ANGLED-IN and ANGLED-OUT have been introduced. These allow inlets and outlets of any arbitrary shape to be placed on the outer surface of any arbitrarily-shaped blockage. The area of action is the area of intersection between the object and any blockage.

VR Editor Improvements PHOENICS Today

VR Editor Improvements PHOENICS Today A new object type ASSEMBLY has been introduced. The assembly object acts as a ‘container’ for any number of other objects, which go together to make a component. Objects are added to an assembly object through the Hierarchy dialog.

VR Editor Improvements PHOENICS Today Components can be added or removed from an assembly

VR Editor Improvements PHOENICS Today All size and position changes made to the assembly object are also applied to all the components.

VR Editor Improvements PHOENICS Today All the objects in the assembly can then be exported to a single file.

VR Editor Improvements PHOENICS Today The saved assembly objects can then be imported into another model.

VR Editor Improvements PHOENICS Today Objects can be partially pushed out of the domain, to allow: Solution over one half of a body, or Solution over any part of a large STL

VR Editor Improvements PHOENICS Today The Editor can output the entire geometry in TECPLOT format. Each object is shown in TECPLOT as a 'zone'.

VR Editor Improvements PHOENICS Today The Editor can also output the entire geometry as a FieldView unstructured file. Each object is shown in FieldView as a Boundary.

VR Editor Improvements PHOENICS Today This is what the Editor makes of it.

VR Viewer Improvements PHOENICS Today When PARSOL is active in Polar co-ordinates,  the contours and vectors in the cut cells are displayed correctly.

VR Viewer Improvements PHOENICS Today Valve simulation

VR Viewer Improvements PHOENICS Today

VR Viewer Improvements PHOENICS Today When cyclic boundary conditions are active, an extra tab appears on the Viewer Options dialog. From here it is possible to repeat the image in the X direction as many times as wanted .

VR Viewer Improvements PHOENICS Today The original geometry

VR Viewer Improvements PHOENICS Today Repeated 9 times

VR Viewer Improvements PHOENICS Today The contours repeated

VR Viewer Improvements PHOENICS Today The colour palette can be reversed

VR Viewer Improvements PHOENICS Today Streamlines can also be repeated

VR Viewer Improvements PHOENICS Today The sources and sinks for an object can be displayed:

VR Viewer Improvements PHOENICS Today For selected objects, the surface contour values can be output to a file which can be read into Excel or Autoplot. 3D Nav.Sto.Flow Around A Moving Van Pressure surface values for object BODY2 ----------------------------------------- X Y Z Pressure 1.0000E+00 3.0000E+00 6.0000E+00 -1.1501E+01 8.7500E-01 3.0000E+00 6.0000E+00 -8.1237E+00 8.7500E-01 3.0000E+00 6.5000E+00 -2.0226E+01 1.0000E+00 3.0000E+00 6.5000E+00 -2.1001E+01 8.7500E-01 3.0000E+00 7.0000E+00 -3.2328E+01 1.0000E+00 3.0000E+00 7.0000E+00 -3.0502E+01

VR Viewer Improvements PHOENICS Today For selected objects, a surface profile on the current plotting plane can be output to a file which can be read into Excel or Autoplot. X Y Z Pressure 1.000000E+00 1.583333E+00 8.250000E+00 -1.893729E+01 1.000000E+00 1.750000E+00 8.250000E+00 -1.884477E+01 1.000000E+00 1.916667E+00 8.250000E+00 -1.866686E+01 1.000000E+00 2.083333E+00 8.250000E+00 -1.838086E+01 1.000000E+00 2.250000E+00 8.250000E+00 -1.799543E+01 1.000000E+00 2.416667E+00 8.250000E+00 -1.749649E+01 1.000000E+00 2.583333E+00 8.250000E+00 -1.690780E+01 1.000000E+00 2.750000E+00 8.250000E+00 -1.624763E+01 1.000000E+00 2.916667E+00 8.250000E+00 -1.554297E+01

VR Viewer Improvements PHOENICS Today Pressure profile on an aerofoil

Earth Improvements PHOENICS Today For buoyancy-driven flows, the effect of buoyancy on turbulence can be significant. In stably-stratified flows, such as smoke layers, turbulence can be damped. Conversely, in the vicinity of plumes, the turbulence can be enhanced. These effects are implemented in the K-ε models via an additional source term.

Earth Improvements PHOENICS Today The choice between stable or unstable stratification was previously made by setting a constant to 0.0 or 1.0, and so could never be universally correct. An 'auto' function has been introduced which switches between the stable and unstable forms depending on the local flow direction. This should produce better results for cases with zones of both stable and unstable stratification.

Earth Improvements Geometry of standard room fire test PHOENICS Today Geometry of standard room fire test 62.9MW steady fire

Earth Improvements Buoyancy constant = 0 -> layered flow PHOENICS Today Buoyancy constant = 0 -> layered flow

Earth Improvements PHOENICS Today Buoyancy constant = 1 -> Plume

Earth Improvements PHOENICS Today Calculated buoyancy constant

Earth Improvements Auto solution is somewhere between plume and layer! PHOENICS Today Auto solution is somewhere between plume and layer!

Earth Improvements The solution can be output in TECPLOT format. PHOENICS Today The solution can be output in TECPLOT format. An output file, TECDATA.DAT, containing two TECPLOT zones for each PHOENICS domain is written. The first zone contains data at the cell centres (adjusted for PARSOL cut cells), and the second contains data at the cell corners. The first is better for plotting vectors, the second for plotting contours and iso-surfaces.

Earth Improvements PHOENICS Today The geometry and solution from Library case V146 displayed in TECPLOT 10.

Earth Improvements PHOENICS Today The solution can be output to FieldView in PLOT3D format. Two output files, FVDATA.G and FVDATA.F, containing two grids for each PHOENICS domain are written. The first zone contains data at the cell centres (adjusted for PARSOL cut cells), and the second contains data at the cell corners. The first is better for plotting vectors, the second for plotting contours and iso-surfaces.

Earth Improvements PHOENICS Today The geometry and solution from Library case V146 displayed in FieldView 11.

VR Viewer Improvements PHOENICS Today In addition to the normal multi-coloured vectors, we can have Vectors all in one colour Or any thickness Or with the size of long vectors limited

General Improvements A ‘quick-zoom’ function has been added PHOENICS Today A ‘quick-zoom’ function has been added Press the control key then move the mouse sideways to drag a zoom-box.

General Improvements PHOENICS Today The axes can be ‘unlocked’ from the domain origin, and placed anywhere

General Improvements PHOENICS Today The hand-set icons appear on the tool bar, so the hand-sets can be turned off

General Improvements The image can be annotated with text strings PHOENICS Today The image can be annotated with text strings

General Improvements PHOENICS Today We are now testing a 64-bit Windows version of PHOENICS It does not suffer from the memory limitations of the 32-bit versions Preliminary tests seem to show that performance is very similar, however many bits there are!

General Improvements PHOENICS Today The location of the PHOENICS installation is now held in an environment variable. This makes it possible to install PHOENICS into any convenient location, not just the root of a drive. It also makes network installations neater, as only the environment variable and a working directory need be present on client machines.

SPP Improvements PHOENICS Today The following Special-purpose versions have been brought into the VR environment: CVD, for Chemical Vapour Deposition ESTER, for Electrolytic Smelting of Aluminium Both have dedicated Main menus and object types

FLAIR PHOENICS Today Now a few words about the FLAIR Special-Purpose version of PHOENICS. Some people have asked ‘What is FLAIR?’

What is FLAIR? PHOENICS Today FLAIR is a Special-Purpose version of the general CFD code PHOENICS. It is aimed at the HVAC community. It has been created by removing many unneeded generic features, and adding several specific features.

FLAIR Features PHOENICS Today FLAIR uses the PHOENICS VR-Editor to set the problem up, with the following additional items: ISO 7730 Comfort index calculations: PMV, PPD. ISO 7730 Draught rating. CIBSE dry resultant temperature. Humidity calculations, with output of humidity ratio and relative humidity. Smoke movement calculation, with output of PPM, smoke density and visibility. Mean age of air calculation. Fan operating point calculation for single and multiple fans. System-curve calculations.

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Round

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Vortex

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Rectangular

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Directional

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Grille

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Displacement

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Fire

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Fire

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Fire Person (standing or sitting facing any Direction)

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Fire Person Crowd To represent a large number of people as distributed source of heat

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Fire Person Crowd Sunlight Created in Shapemaker

FLAIR Features PHOENICS Today In addition, the following object types have been added: Diffuser Fire Person Crowd Sunlight Spray head

FLAIR Features PHOENICS Today Spray-head represents sprinklers user for fire-suppression. It uses GENTRA to model the droplet paths. Evaporation is considered, and is linked to the FLAIR humidity model. The GENTRA inlet table is written automatically.

FLAIR Features PHOENICS Today Spray-head represents sprinklers user for fire-suppression. It uses GENTRA to model the droplet paths. Evaporation is considered, and is linked to the FLAIR humidity model. The GENTRA inlet table is written automatically.

Geometry Creation PHOENICS Today We are often asked to create geometry from unusual sources. Recently we received a PDF file which contained this image-

Geometry Creation The numbers represent the height of the building PHOENICS Today The numbers represent the height of the building

Geometry Creation PHOENICS Today The solution was to save the image as a GIF file, then use it as a backdrop in AC3D We could trace round each part, then extrude

Geometry Creation The resulting geometry was then exported to PHOENICS PHOENICS Today The resulting geometry was then exported to PHOENICS

PHOENICS Today