Use of RNG subgrid scale model with LES model in FLUENT-6.2 and beyond |
Is it possible to use RNG subgrid-scale model in FLUENT? I am not able to find any option in GUI to enable RNG subgrid model. This option was available in previous versions.<br>It is... |
Can POLYFLOW read in ICEM CFD meshes? |
Can POLYFLOW read in ICEM CFD meshes?<br>How to proceed?<br>It is still possible to read ICEM files into POLYDATA (see sections 7.3 and 5.2.2 of the manual). Actually, POLYCEM refers... |
POLYFLOW - How to plot a membrane (thermoforming) in ANSYS? |
Let us consider that a thermoforming simulation with POLYFLOW is completed. Output files are created for ANSYS Mechanical. How can one display the thermoformed object in ANSYS, including the... |
Writing UDFs |
Simulation with linked UDF yielding unexpected results<br>1. While writing UDFs, the first and foremost thing to keep in mind is that all parameters assigned in UDFs have to be in SI units... |
POLYFLOW - Library not found... (e.g. /Fluent.Inc/polyflow3.12.2/lnamd64/libs/libstdc++.so.6)) |
When starting POLYFLOW, an error message is generated, which informs that a library is not found, such as /Fluent.Inc/polyflow3.12.2/lnamd64/libs/libstdc++.so.6 . What can be... |
POLYFLOW - zero pivot for LMI000... variable at the inlet |
The user defines a flow with the light viscoelastic model (ScaFTen), where the relaxatio ntime is constant. The calculation stops during the first iteration of the first step for the evaluation... |
Best-Practices for Large Eddy Simulations (LES) in FLUENT |
Please provide some guidelines for LES simulations.<br>Please review:<br><br><a target=_blank... |
POLYFLOW - Some recommendations for 3D MST calculations? |
Are there some useful recommendations for running a 3D MST calculation?<br>The document MST.pdf below contains a few recommendations about<br>- clearance<br>- geometry for entry... |
POLYFLOW - allowing adaptive meshing for large field variation using TGRID |
Currently, adaptive meshing based on large field variation can only be invoked using the element subdivision whereas adption for contact and/or remeshing is done using TGRID. The two adaption... |
POLYFLOW - Initial boundary conditions at the inlet (orientation, anisotropy, stretching) for the DCPP model in film casting? |
What is the definition of the stretching variable (in words)?<br>What typical values can be imposed<br><br>Anisotropy factor s.<br>If s=1 along a certain direction, this... |
POLYFLOW - CFX-Post crashes when reading POLYFLOW result files |
A crash is encountered when<br>- reading a file,<br>- when reading a new result file for a transient case,<br>- etc.<br>This may typically happen when a former version of... |
POLYFLOW - Model for fibre spinning |
What model should be selected for the simulation of fibre spinning, including the simulation of the swelling at the die exit?<br>What property should be measured?<br>First of all, in... |
POLYFLOW - error for a calculation with UDF (user defined fucntion): "CLIPS data structures are in an inconsistent or corrupted state." |
A calculation with a UDF produces the following error message:<br>"CLIPS data structures are in an inconsistent or corrupted state.<br> This error may have occurred from errors... |
POLYFLOW - Hencky and Cauchy strains (deformations)? |
What are the definitions of Cauchy and Hencky strains?<br>What is the relationship between them?<br>Information can be found in the document Cauchy_Hencky.pdf below. |
Face separation on adapted hex meshes |
There is one set up method where the user wants to start from a very rough hex mesh which describes the overall geometry of the problem. Then, adapting is done in selected areas to be able to... |
POLYFLOW - Launching CFXPost from POLYMAN |
What path must be specified in POLYMAN?<br>On Windows, the path should contain the string<br>... v111CFXPostbincfx5post.exe<br><br>On Linux, the path should contain the... |
How to get the same standard k-epsilon as CFX? |
The standard k-epsilon in Fluent differs from original standard k-epsilon by the fact that production of k differs:<br>Gk=mu_eff* S^2 (for incompressible flow)<br>instead... |
Error: ASSQ: invalid argument [2]: improper list |
Fluent gives the following error when iterating<br><br>Error: ASSQ: invalid argument [2]: improper list<br>Error Object: #f<br><br>The error occurs when you have a... |
Gambit startup: "free memory is now less than 20%..." -- crash |
This is most probably for Linux (and UNIX?) only!<br><br>A customer has a problem when launching Gambit, gets the following error message:<br><br>"LANG en_US.UTF-8... |
POLYFLOW - can POLYDATA convert an ICEM-mesh file that contains pyramid elements? |
When trying to convert an ICEM file that contains pyramids, the program issues a warning:<br><br>-----------------------------------------------<br>Unsupported element... |
How to create mass weighted average function by UDF on a surface? (not on a zone or thread) |
The following UDF allows you to compute mass weighted average of temperature based on any surface. You just have to provide surface ID.<br>#include "udf.h"<br>#include... |
POLYDATA - "Error in BBDSME; inconsistency in the data number" |
Definition of a flow case with transport of species. The flux post-processor is asked on a boundary for the transported variable (menu for Concentration boundary condition). At the backend, this... |
Benchmarking axi-symmetric pipe flow with sudden expansion |
I am solving for flow in an axi-symmetric sudden expansion. Essentially I have a small pipe attached to a larger pipe. I am mainly interested in re-attachment points over a range of Reynolds... |
POLYFLOW - How to plot a variable vs. residence time along one trajectory? |
Let us assume a flow solution; velocity field and other results are known. How can one plot the evolution of a selected variable vs. residence time along a given trajectory?<br>This can be... |
POLYFLOW - Solver ends with the message "Blocs exhausted. NBLOCS > 20000 in the .p3rc file." |
A POLYFLOW case is defined where the output for CFX-Post is asked. The calculation stops with the error message "Blocs exhausted. NBLOCS > 20000 in the .p3rc file."... |