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POLYDATA - trouble in defining a PMAT dependence with respect to S (evolution parameter)


When defining a PMAT or UDF in POLYDATA, one has indeed access to S (evolution parameter) or time as a possible dependence quantity. However, when choosing another field, one does no longer have...

POLYDATA - How can one easily run a blow moulding/thermoforming case with KBKZ model at another temperature without re-entering all material data?


The user wishes to run many isothermal thermoforming simulations with the KBKZ model, each at a different sheet temperature. A fact is that all parameters are affected by the shift factor. How...

POLYFLOW - Why does the listing file (log file) report various numbers for the mesh deomposition (with Metis)?


When inspecting the listing file, it may happen that apparently non-consistent information be displayed, such as:<br> Computation domain decomposed into 256 sub-parts<br> ...

FLUENT V6 - Procedure for setting up a non-premixed combustion simulation using materials from CHEMKIN database


Procedure to create a non-premixed combustion case using materials from CHEMKIN database in FLUENT 6.3.17<br>1. Copy the thermo.db file located in...

FLUENT 6 - Creating a non-premixed combustion case using materials from CHEMKIN database


Procedure to create a non-premixed combustion case using materials from the CHEMKIN database in FLUENT 6.3.<br>1. Copy the thermo.db file located in...

FLUENT V6 - Procedure for setting up a laminar flamlet combustion calculation (steady & unsteady) using the CHEMKIN database


Procedure to create a steady and unsteady laminar flamlet combustion case using materials and reactions from CHEMKIN database in FLUENT 6.3.17<br>STEADY LAMINAR FLAMELET:<br>1. Copy...

FLUENT V6 - Procedure for setting up a partially-premixed combustion simulation using materials from CHEMKIN database


Procedure to create a partially-premixed combustion case using materials from CHEMKIN database in FLUENT 6.3.17<br>1. Copy the thermo.db file located in...

POLYFLOW - Where do I find the mesh and data files for the POLYFLOW examples?


The POLYFLOW Examples' manual describes various simulation cases. These examples refer to files. Where can they be found?<br>The corresponding files are located in the installation...

FLUENT V6.2 - Inconsistent mass flow rate report via surface integral in areas of reverse flow and possible solutions


With FLUENT 6.2.16, you may see inconsistent mass flow rate reports via surface integrals in the region where the flow has reverse flow or in any case where velocity vectors are not consistently...

FLUENT V6 - Compiler directive "#if RP_AXI" in User-Defined Functions (UDF) not behaving as expected


The compiler directive<br><br>#if RP_AXI<br><br>is sometimes used to identify parts of a UDF that are only applicable to axisymmetric models. However, this is actually...

FLUENT V6 - How to change the model constants in the Taylor Analogy Breakup (TAB) spray model


The model constants in the Taylor Analogy Breakup (TAB) spray model are not available in the GUI or TUI. Is there some way I can modify them?<br>These constants can be accessed through a...

FLUENT 6.2.16 - startup error: unexpected EOF while looking for matching `"'


FLUENT 6.2.16 produces an error during startup: (Fluent.Inc/bin/fluent: line 3600: unexpected EOF while looking for matching `"')<br><br>Occurs with bash version...

FLUENT V6 - how to find the ID number of the interior face zone that is generated by the interface boundary type


Sometimes, one needs to calcuate the mass flow rate through the interior face zone that is generated by the interface boundary type between two meshed volumes. This is typically done within a UDF....

Icepak - file exchange options between Icepak and FLUENT


This solution provides guidelines and procedures to create a FLUENT case file in Icepak and postprocessing data files for Icepak within FLUENT.<br>This will summarize all the possible ways...

POLYFLOW - How to define an inverse extrusion case with take-up velocity (draw down) for e.g. fibre spinning?


When defining an inverse extrusion case that involves a take-up velocity, such as in fibre spinning, the solver can encounter difficulties to converge.<br>In fact, there is a redundancy...

POLYFLOW - Error in list1d, "Invalid qconnec initial seed"


A 2D simulation involves boundaries that are made of disconnected edges. The simulation runs apparently well, but the solver crashes with the following error message : "Error in list1d,...

POLYFLOW - error message: "A serious internal error has occurred (in CTRWRI)"


This message usually appears when the number of constraints is large compared to the number of variables of the problem. It also happens when a very large flow simulation is...

POLYFLOW - trouble with the license on HPUX Itanium: error message "A valid license could not be checkedout." or "Polyflow not licensed"


When running POLYFLOW on a multiproc HPUX Itanium machine, the calculation is interrupted and the listing reports<br>"Intern in CREPRO - Polyflow not licensed."<br>as...

FLUENT 6.2 - Mass imbalance in simulating gas-solid flow with Eulerian granular model when having solid sink in the bed and when solid volume fraction approaches packing limit


We met with a problem that mass imbalance occurred while using a udf sink in extracting solid from the solid bed. The solid volume fraction of 0.29 was patched into the bed as the initial...

FLUENT 6 - how to use porous media to model louvers used in windows


Given the pressure loss vs velocity characteristics for the louvers used for windows, how can one replace the louvers with porous media such that the presure drop matches AND the flow is turned? ...

POLYMAT - it may happen that POLYMAT ignores the weight of G' anf G" when fitting the parameters of a model.


User attempts to identify the material parameters for a non-isothermal single-mode Giesekus model, where the weight for linear properties (G' and G") is set to 10^-12. The fitting...

POLYDATA - error messages at the end of the session: "Error during opening of a temporary file.", "Sub-tree copy has failed !"


At the end of a POLYDATA session, the following error messages are generated:<br> ***WARNING*** from *COPTRE*<br> Error during opening of a temporary file.<br> ...

POLYFLOW - A field seems improperly initialised at the restart of a calculation


A non-isothermal transient calculation is restarted from an existing result file. When inspecting the sequence of result files, the temperature undergoes a jump, which suggests that the result...

POLYMAN - how to import a GAMBIT neutral file into POLYMAN, and how to convert it?


A GAMBIT neutral file has been created with GAMBIT, but outside the POLYMAN environment. Is it possible to import this file into a POLYMAN project, and how to proceed? In particular, how can one...

POLYMAN - Possible trouble while opening projects


Troubles may occur in POLYMAN, while opening multiple projects, etc. Also, it happens that an error message is generated, of the type "index out of bounds" while opening an existing...