Changing a material property causes the V.O.F. simulation to diverge. |
| A VOF simulation that was converging, now has convergence problems.
Check for the following error at the end of your FDSTAT file: ***** E X E C U T I O N E R R O R ( 14104) TIME STEP DECREASING... |
How to Simulate multiple mixtures by thread id? |
| In multiple species problems, there can only be ONE mixture. This is a problem in multiple channel flows with different fluid types, especially in cases where one of the fluids is a multiple... |
Compilation of UDF fails on IBM Power 3 |
| On compiling a UDF on IBM Power 3, the system reports the following problem:
/bin/sh: cc: not found. make[3]: *** [udf_names.o] Error 127 The indication is that the compiler cannot be found. The... |
ERROR: Invalid shadow-node id 0; node = 28282, face = 87143, index = 0. |
| Above error(node and face numbers in the error are case specific) is encountered in parallel version of Fluent when grid check is performed while there is no problem in serial version.... |
Implementing Buoyancy effect in the K-Omega Turbulence Model using Segregated Solver
|
| The K omega turbulence model does not include any turbulence generation term due to buoyancy. That term could be important in modeling natural convection with K-Omega.
A source term to the K... |
POLYDATA - Error message: brozinc not found!
|
| When calling POLYDATA on a PC, the following error message may appear:
D:userssupportpolyflow>polydata POLYDATA3 : Using VTK viewer ... Executable C:Fluent.Incpolyflow3.10.0ntx86/bin/brozinc not... |
Error: domain-thread-integrals: invalid thread |
| Error might be encountered when a zone defined in one of the monitors doesn't exist. For instance, say a surface monitor is defined with an interior surface . Later on the interior surface is... |
A workaround for bad syntax error when importing in Fluent from File > Import
|
| If, when importing a mesh into FLUENT through File > Import in the GUI, an error message similar to the following appears:
Reading "| utility fe2ram -tANSYS -d3 C:Documents and... |
A problem was encountered when interpreting a UDF on Windows. The command terminated with parse error - parse error. |
| The situation occurred since there were blank spaces in the name of the directory where the source file is located.
Rename the directory so that there are no blank spaces in its name and you are... |
How to debug the error when launching Fluent-Wave cosimulation |
| During the setup of a Fluent-Wave cosimualtion, the coupling module will be called and the wave will be launched in the background when you click the start button in Define -> 1D coupling... |
Graceful exit from a batch run with an error |
| On running in batch mode, any error generated when reading the journal file (e.g., wrong case/data name, no license available, divergence, etc.) causes the batch file to just stop dead. This is... |
How to ensure that a particular interior face zone lies within one partition? |
| Sometimes we need to ensure that a particular interior face zone lies within
a single partition in a parallel simulation. (Fluent6.1.22 has a bug that we cannot convert an interior face zone that... |
POLYFLOW - 'qa' cannot be executed (for checking UDF) |
| A typical error message issued when invoking the executable 'qa' (for checking udf):
/usr/local/Fluent.Inc/release/polyflow3.11.0/lnx86/bin/qa: error while loading shared libraries: ibcxa.so.1:... |
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:
When displaying a graphics, cortex reports various error messages from... |
Including non-ansi functions from 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 'implicit... |
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:
1) Robust - relative to... |
Shell Conduction in Parallel in Fluent? |
| FLUENT gives error when I try to turn on shell conduction option in parallel mode.
First you need to activate the shell conduction in the serial solver. You then partition the case after... |
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 cannot be... |
POLYFLOW - Flow case with full slipping and inflow (constant normal force) may fail
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| When defining a flow case (extrusion or not) with inflow calculation based on constant normal force and involving full slipping, the calculation may diverge.
This may also happen with prior... |
Fixing corrupt ACIS geometry using a parasolid file |
| Occasionally, GAMBIT users who generate ACIS geometry using the tools available within GAMBIT find that the geometry has become corrupt. This is indicated, for example, by a volume split which... |
inverted volumes in thin annular space |
| User got message about inverted volumes and high skewness while meshing a cylindrical looking volume using cooper scheme. The cooper direction was radially inwards. He did not want to decompose... |
Flowtime tends to "wander" in an transient ensight .encas file |
| While exporting data in transient ensignt format from a fluent simulation
one might sometimes observe that the flowtime recorded in the .encas file increases and decreases randomly rather than... |
Primitive Error at Node 0: dump_face out of memory |
| Problem Description:
You have just purchased a dual processor machine with 4 GB of RAM. You have a large case file (between 3 - 4 million cells). While reading in the case file in parallel you... |
Specify both spatial and temporal temperature profile on a wall zone |
| In some heat transfer simulations, user will want to impose a temperature profile on a given wall zone that is
varying both spatially and temporally. That is, at different times, the spatial... |
Cannot launch GT-Power during Fluent-GT coupling
|
| Error appears when coupling Fluent with GT-Power. The error message can be like this:
Unable to get IOR from server /appl/fluent6.1.18/Fluent.Inc/coupling/bin/gtpower. When Fluent is trying to... |