POLYFLOW - measurement of elongational viscosity |
In year 2004, the company TA instruments has acquired Rheometrics. This has affected the availability of some measurement devices. In particular, the RME has disappeared from the list. Hence, a... |
FLUENT 6.2: You must include the library name when executing UDFs via the text user interface |
To call UDFs from the text user interface (TUI) in FLUENT 6.2, you must alter slightly the function name. For example, the following procedure to call the EXECUTE_ON_DEMAND function works fine... |
FLUENT: How to manually partition the grid such that each fluid zone is defined as a separate partition |
A FLUENT grid may have a number of fluid zones and it is desired to partition the grid in such a way that each fluid zone is defined as a separate partition. How can this be... |
POLYFLOW: How to handle former result files when adaptive meshing is used |
A simulation is running, where adaptive meshing is being used. If the main solver fails and the calculation is aborted in the step involving the adaptive meshing, how can one obtain mesh and... |
FLUENT - Using the profile file generated with the In-Cylinder model for other deforming mesh applications |
With the In-Cylinder model in FLUENT, a profile file can be written out that describes the In-Cylinder motion. This file can then be modified to accomodate the mesh motion for other deforming mesh... |
GAMBIT - Utility to calculate the shape parameter required to create conic sections |
In order to create a conic section geometry in GAMBIT, a "shape parameter" has to be specified by the user. the equation of the conic section.The user may only know the equation of... |
FLUENT - Write case/data with flow time in the name of the file. |
If the flow time is 8.56 seconds, then I want to write a filename with<br><br>foo_8.56.cas.gz<br><br>and<br><br>foo_8.56.dat.gz<br><br>;;; At the... |
FLUENT - Workaround for calculating a species gradient normal to a surface within a udf |
<br>Fluent gives a SEGMENTATION fault if one tries to calculate the gradient of species (except first species) using C_YI_G(c,t,i) macro.<br>Workaround for above problem is to store... |
POLYDATA POLYFLOW POLYMAT: Error message: "can not open file ..Documents " when opening a file on a Windows platform |
The following error message (or something similar) is generated on the screen when trying to open a file in POLYDATA, POLYFLOW or POLYMAT:<br>"can not open file ..Documents and... |
FLUENT 6: How to write the solution residuals to a text file |
Sometimes there is need to write the residuals to a separate text file. Normally, the residuals are printed in the FLUENT console and they are also written to the data file. However, in some... |
FLUENT 6.2 - Using different versions of a UDF library |
You may have a CFD model with many user-defined scalars that you would like to calculate with varying source terms (DEFINE_SOURCE). Instead of changing the values of the source terms through the... |
FLUENT 6.2 - Coupling with GT Power v6.1 on the RedHat v9 Linux hardware platform |
The GT Power coupling feature in FLUENT 6.2.16 officially supports coupling with GT Power v6.0 but not GT Power 6.1. This solution provides a method to enable coupling between FLUENT 6.2 and GT... |
How to do cross-platform coupling with GT-Power and Fluent |
This solution contains instructions for running the FLUENT / GT-Power coupling feature on two different platforms, i.e. Fluent running on UNIX/Linux and GT-Power running on Windows.<br>This... |
AIRPAK - How to properly account for sensible heat and latent heat for indoor ventilation simulation |
Engineers are given information on the total cooling load of a space due to occupants that identifies both the sensible heat (SH) and latent heat (LH) components. what values should be entered as... |
FLUENT - Writing hardcopy files (tif,mpeg) from a previously saved animation sequence |
If you successfully create animations from a FLUENT case, exit FLUENTand then restart a new session to create hardcopy files, FLUENT will show the animation correctly, but<br>will report... |
POLYFLOW - Accuracy of the generalised shear rate reported along the wall of a cylindrical tube |
When displaying POLYFLOW results for the Poiseuille flow of a power-law fluid, it can be found that the post-calculated wall shear rate does not exactly match that analytically... |
POLYFLOW - convergence/divergence, accuracy, precision for a power law or Bird-Carreau fluid model with a low index (non-Newtonian inelastic or generalised Newtonian) |
Flow simulations that have a generalised Newtonian (non-Newtonian inelastic) fluid model, such as power law or Bird-Carreau, with a low power-law index may quickly diverge. What can be done to... |
POLYFLOW - Definition of temporary file for buffering |
When and where does POLYFOW create a temporary file for buffering purposes?<br>Can the user assign a specific directory?<br>When running a calculation, POLYFLOW creates a pfl_buffer... |
FLUENT 6.2 - FMG initialization fails for 2D axisymmetric cases with swirl, turbulence and node-based gradients turned on |
If you are running a 2D axisymmetric case with swirl and have turbulence and node-based gradients turned on, the FMG initialization will fail. FMG iterations will go to completion but all variable... |
POLYSTAT - display steady results on a deformed mesh (free surface) |
How do I display graphical results for a steady flow on a deformed geometry (free surface) in POLYSTAT? How can I account for update of the coordinates?<br>The updated cordinates are stored... |
FLUENT 6 - Tips for converging the VOF free surface model with the Non Iterative Time Advancement (NITA) solution scheme on tetrahedral meshes |
It has been observed that some calculations that include the VOF free surface model with surface tension and the Non-Iterative Time Advancement (NITA) solution scheme on tetrahedral meshes... |
FLUENT V6 - Generating a step-by-step particle tracking report file from a calculation running in batch mode |
<br><br>Running FLUENT calculations in batch mode requires the use of text user interface (TUI) commands written in a journal file. The Step-by-Step particle tracking feature available... |
FLUENT 6 - writing residual plots when running in batch mode |
When running FLUENT in batch mode one may wish to monitor the solution progress by viewing the residual history and monitor plots.<br>Monitoring the progress of a FLUENT simulation run in... |
POLYDATA - wrong colours in the graphical window of polydata_wx |
For both 2D and 3D geometries, it happens on some machines that the set colours for topological entities are not properly displayed, as if the source light was... |
FLUENT 6 - Tip for displaying a velocity vector plot where the vectors are uniformly distributed on the displayed surface |
In a velocity vector plot, one arrow will be displayed for every cell by default. As a result, the density of vectors will be directly proportional to the mesh density. If non-uniform mesh has... |