POLYDATA - Units of an angular velocity ? |
What are the units of an angular velocity ?<br>Unless otherwise specified, the units of angular velocity in POLYFLOW are rad/s. The only exception to this rule is found in the definition of... |
MixSim: Retreat Curve impeller: How do I tell the impeller diameter? |
I've been given the task to simulate a retreat curve impeller with a given diameter.<br>In MixSim, there is no option to enter the impeller Diameter.<br>What can I... |
Calculation fails with "fix" option enabled for a velocity component - a workaround |
The "fix" option in the Fluid BC panel permits you to fix a solution variable in a fluid zone.<br>In some cases, if a velocity component is fixed, the pressure correction... |
Mixsim writes files to a remote directory if the HOMEPATH and HOMEDRIVE variable are set to that remote directory |
This whole Solution applies to MixSim 2.0.2 on WINDOWS ONLY..!!<br><br>On login the HOMEPATH and HOMEDRIVE variable are set to a network drive which is the users working directory. ... |
UDF to modify underrelaxation factor |
Client wants to set URF for temperature at iteration 0 to 0.9 and gradually increase it to 1.0 over a set number of iterations.<br><br>The following UDF does... |
Effective Strategy for ensuring convergence using FLuent's Fan Model |
If we switch on the fan model at the start so that it computes the Pressure Jump<br>from a fan curve, it is found that the solution diverges<br>after sometime and it predicts... |
MixSim2: Windows: Cannot use compiled UDF (user defined function) |
When I try to load a compiled user defined function (UDF) into the FLUENT process inside MixSim on Windows, I get an error message telling me something about "fl6020s.exe" that... |
How to display cells with high turbulent viscosity ratio? |
Often times during your simulation you will see a message that turbulence viscosity ratio<br>has exceed the upper limit (default 1e+5) in a certain number of cells. Do the... |
Shell Conduction in Parallel |
FLUENT gives error when I try to turn on shell conduction option in parallel mode.<br>First you need to activate the shell conduction in the serial solver. You then partition the case after... |
Users want to obtain graphics in batch mode with color ramp based on local range |
Users have reported their desire to produce graphics - contour plots - in batch mode - running Fluent journals -<br>with color ramp based on the local minimum and maximum of the quantity.... |
Macro-Based Heat Exchanger Model Limitations |
The macro-based heat exchanger model is in v6.1. There are some limitations that one need to be aware of.<br><br>1. The macro-based approach to modeling heat exchangers, if used on... |
Scheme file for scaling cell zones through journal file |
There might be a need for scaling all the zones with same scaling factors in TGrid. If there are many zones then it becomes cumbersome to invoke the necessary TUI command for all of them... |
FLUENT 6 - Time step size for Geo-Reconstruct VOF simulations |
Selecting the appropriate physical time step is important for transient VOF simulations using the Geo-Reconstruct formulation. A good time step will make the run:<br><br> 1) Robust -... |
How to use the swirl fraction to define the spray angle in the hollow cone injection |
In the hollow cone injection, the swirl fraction can be used to define the swirl velocity component, and then the spray cone angle. The swirl fraction is defined... |
Including non-ansi functions from <math.h> in compiled UDFs |
The Fluent makefile uses the 'ansi' flag which excludes certain library functions, e.g. the error function in <math.h>. You will get a compiler warning... |
POLYMAN - trouble while reading a mesh or a data file |
In POLYMAN environment, when running a POLYDATA session with a mesh file or a data file that were imported, troubles may occur when saving the new file. Troubles can be:<br>- no file... |
problem with Fluent graphics window when running MS NetMeeting |
When showing FLUENT during a web conference using MS NetMeeting, some problematic behaviors have been reported, such as:<br><br>When displaying a graphics, cortex reports various error... |
POLYFLOW : forces on slices does not always work. |
When asking for the forces on slice, the information displayed in the listing file may differ from the expected results.<br>Currently, the situation is not too clear. In the mean time, The... |
Some times I see negative Heat flux at inlet and positive heat flux at outlet. Is it possible to have such results ? |
Yes, it is possible. This is because in the calculation of heat flux at flow boundaries, heat of formation is also included. Following is the explanation of the same :<br>The energy flux... |
Users want to be able to repeat sections of Fluent journal files in loops |
Users have expressed their desire to be able to automate runs by using journal files in which<br>entire sections of many commands are repeating, in... |
Which compiler should I use for FiDAP on the Windows OS? |
Which compiler should I use for FiDAP on the Windows OS?<br>The Fidap release notes call for Digital Visual Fortran 6.6 Standard Edition, but due to the merger of HP and Compaq, this... |
Double buffering display option creates graphics problems with OpenGL driver |
When using OpenGL driver and Double Buffering display option, zooming in and out leads to<br>"white-band" on the sides of the graphics window and heavy... |
POLYFLOW - 'qa' cannot be executed (for checking UDF) |
A typical error message issued when invoking the executable 'qa' (for checking udf):<br>/usr/local/Fluent.Inc/release/polyflow3.11.0/lnx86/bin/qa: error while loading shared... |
Abaqus export for fluid zones |
Presently it isn't possible to export pressure data in ABAQUS format on a face zone adjacent to a fluid zone. Following workaround could be used.<br><br><br>Export the... |
Make Gambit journal generic for parametric geometry creation |
If you want to create a parametric journal file where the geometric location of vertices, faces or volumes will change from one case to another, GAMBIT might choose to change the numbering of... |