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POLYFLOW - Error message "Only 100 EVALXS blocks are permitted in SVARIA block" or "Only 100 EVALS blocks are permitted in SVARIA block". What can be done?


This error message is typically encountered when the user solves a flow simulation that involves a large number of evolution or time-dependent functions. It is here worth mentionning that some...

POLYFLOW - Some useful evolution functions for the power index of a viscosity law.


Evolution strategies are usually recommended when the viscosity law (Bird-Carreau or power laws) involves a low index. However, the selection of an evolution function and its parameters can...

How do I prepare a Fluent model for 1D coupling at sudden area changes ?


When doing 1D coupling with Fluent, the area at the coupled boundary location between Fluent and the 1D code may be different (e.g. exhaust header pipes).<br>Please refer to the attached...

Getting the cell near to the surface points created using Surface Panel.


In some of the applications for post processing, the points on the surfaces created for Post-processing needs to be accessed so that required quantities can be calculated using a user defined...

how can my UDF write output files with the flow time as part of the file name


A common request from users is for the name of output files written from a UDF to be appended with the flow time. This may be confusing for someone who has no formal training in C-programming,...

Reading a mesh exported from Gambit in cdb format into ANSYS?


Some users make use of GAMBIT as a pre-processor to generate mesh for ANSIS simulation. Hence, it is worth noting the typical steps required for this process.<br><br>The following...

Error: soeniputfile: Unable to open pipe for input


Trying to read or write gzip files produces this error<br>How are you launching Fluent? Through a shortcut on the Desktop? Have you placed a shortcut on the Microsoft Office Start...

POLYFLOW - error when converting a result file on an AMD Linux 64 bits (relocation error, GLIBC)


When converting old results file in POLYDATA, the following error message can appear:<br>Starting ..../Fluent.Inc/polyflow3.10.2/lnx86/bin/polyflow -ES...

POLYFLOW - The absolute pressure at the exit does not seem to match the selected boundary conditions


In a 3D calculation, the absolute pressure at a die exit does not seem to match the assigned boundary condition. Is there a way to find a gauge/absolute pressure at the exit of a...

How to obtain convergence for k-omega model starting from k-epsilon solution-FLUENT-6.1.22


While starting k-omega solution from initial solution of k-epsilon one may encounter convergence difficulties. During iterations many cells show turbulent viscosity warning messages. How to...

POLYFLOW - Interactive programs (zinc mode) seem to hang when a dialog box is expected


When running POLYSTAT, POLYMAT, POLYDATA_ZINC or POLYFUSE on Windows XP, the program may appear to hang when a dialog box is expected (for additional user input, such as yes/no approval, filename...

POLYFLOW - Conflict of velocity boundary conditions


Some flow situations may require to impose velocity boundary conditions that are not necessarily compatible. A typical example occurs when boundaries A and B are perpendicular to each other, and...

POLYFLOW - handling the contact point for coating simulation (conflict of boundary conditions)


When defining a coating simulation, a conflict of boundary conditions may potentially develop at the contact point between the free surface and the subsequent moving solid boundary. In steady...

Cannot start FLEXlm on SUSE9.1


<br>Cannot start FLEXlm v8.3b on SuSE 9.1. From the license manager log:<br><br>/usr/local/Fluent.Inc/license/lnx86/lmgrd: relocation error:...

Upgrading to Windows XP Service Pack 2 Causes License Problems


This problem is caused by the Windows XP firewall software on the license server. Prior to Service Pack 2, the firewall was turned off by default. But after installing Service Pack 2, the firewall...

POLYFLOW - 2D contact case with surface tension: trouble with mass conservation or surface motion


When running a 2D contact case with surface tension, such as e.g. in injection moulding, it may happen that the free surface does not move, or that the mass conservation is not...

GLIBC_2.0 not defined in file libc.so.6


When running on SuSE 9.1 and when starting the license manager, you may get the following error:<br><br>/usr/local/Fluent.Inc/license/lnx86/lmgrd: relocation...

FLUENT 6 - Write pressure gradient history in a file (obtained from a translational periodic case)


It is possible to monitor pressure gradient (pressure drop/unit length) as a function of iteration.<br>This can be done in the following panel:<br>Solve-> Monitor ->...

How to stop iteration process from UDF


Sometimes, users want to stop iteration process according to some criteria that are calculated in a UDF. But FLUENT can only stop the iteration process after a fixed number of iterations or when...

POLYFLOW - simulation involving adaptive meshing crashes upon restarting


A transient simulation case involving adaptive meshing crashes when being restarted from previous res and rst files. This has been found when the first calculation has been successfully completed...

Fluent 6.2: How to solve a leakage case with long narrow channels and gaps 2nd order without babysitting


The attached figure <a target=_blank...

POLYFLOW - The generalised shear rate along a plane or axis of symmetry.


When displaying POLYFLOW results, it can be found that the post-calculated shear rate is not exactly vanishing along plane or axis of symmetry. Why?<br>There is no actual remedy to this;...

How to enable drift velocity correction in eulerian multiphase model in FLUENT-6.1?


<br>There is no information available in USER's GUIDE on how to enable the drift velocity correction in the problem set up while dealing with an Eulerian Multiphase simulation. The...

Procedure to identify fluid/solid zone corresponding to an interior surface.


It is unclear when you read the grid which fluid zone corresponds to which interior zone. While the interior zones can be selected individually in the Grid Display panel, the fluid zones cannot....

Fluent 6: Performance and licensing on dual core processors


(1) Can fluent run on dual core processors (e.g IBM Power 4+ or Power 5 etc)<br>(2) What is the performance?<br>(3) How many parallel licenses are needed?<br>(1) YES<br>(2)...