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POLYDATA - cannot open a material datafile whose filename has more than 78 characters


When trying to read a material data file from the installation directory, POLYDATA produces an error message: "cannot open file. Filename has more than 78 characters".<br>This...

POLYFLOW - a possible evolution for non-isothermal flow with viscous heating


What could be a convenient evolution scheme for non-isothermal flows involving viscous heating?<br>When viscous heating is incorporated into a flow calculation, a thermal capacity is needed...

Airpak - Mirroring non-uniform blocks in the height direction


The mirror utility does not work in the height direction for non-uniform polygon blocks.<br><br>This solution is an easy workaround.<br>* Copy the non-uniform block in its own...

FLUENT - Display of partition line or surface traces in parallel


When displaying grid in parallel fluent, "traces" of the partition lines or surfaces are shown by default on the outline of the grid. This happens when edges are selected for...

POLYFLOW - Number of functions exceeded (in CREVLC)


A simulation case involves the definition of several PMAT functions. When running POLYFLOW, the calculation stops with the error message "Number of functions exceeded" originating...

usr/lib64/libstdc++.so.5: version 'CXXABI_1.2' not found


When launching Fluent on Linux you receive the following errors:<br><br>[root@test ~]# /app/Fluent/Fluent.Inc/bin/fluent<br>/app/Fluent/Fluent.Inc/fluent6.3.26/bin/fluent...

Workaround for Airpak cases involving solar load and DO radiation


In Airpak, if we have solar radiation turned on, a transparent surface defined and the DO radiation model turned on for radiation calculations, unrealistic results are obtained. Temperature values...

POLYFLOW - The solver does not identify the proper node for PROBE output


Running a simulation on a subdomain that is part of a mesh containing two subdomains. A probe is defined at a specific location, in the surrounding of the other subdomain. Upon examination of...

Icepak: Start transient solution from steady state solution


<br>Please use the following steps (applies to both steady state and transient):<br>1. When starting the steady state solution, in the Solve panel/Advanced tab, make sure that the...

POLYFLOW : the total permeability is twice the value when the fluid is defined on two subdomains?


In thermoforming/blow moulding applications, when the fluid layer is defined on 2 sub-domain instead of one, rhe total permeability calculated by POLYFLOW and written in the listing file, is twice...

Patching temperatures for transient runs in Icepak


In a transient case, initially, different components in the solution domain may have different temperatures. In Icepak, this can be accomplished by using the procedure given below.<br>The...

Modeling Swirl Diffuser in Airpak


How to model Swirl Diffuser in Airpak?<br>In order to model the swirl diffusers, the first thing to make note of is whether the underfloor plenum will be modeled or...

POLYFLOW - a simple model for viscoelastic coextrusion (encapsulation) ?


How can one define a simple viscoelastic flow model for coextrusion, in order to detect possible viscoelastic effects, originating e.g. from second normal stress difference.<br>Let us...

POLYFLOW - symmetry condition seems lost for a free surface flow.


Symmetry conditions is defined on a boundary for a free surface flow, and does not seem to be verified in the calculation. It is observed e.g. that the free jet twists about the direction of...

POLYMAN - Syntax in the polyman.ini file for path?


When specifying the path to a specific product in the polyman.ini file, which syntax should be used on windows?<br>On windows, the separator consists of , while the suffixe .exe is needed...

POLYFLOW - On the importance/relevance of viscous heating and its influence/effect on a flow?


How canone quickly estimate the importance or relevance of viscous heating and its influence/effect on a flow, without performing too much calculations? This would be useful to know whether...

libxcb: WARNING! Program tries to unlock a connection without having acquired a lock first, which indicates a programming error


After updating openSuSE to 10.3 and trying to run Gambit you receive a libxcb error.<br><br>libxcb: WARNING! Program tries to unlock a connection without having acquired a lock first,...

ssh_keysign: no reply - key_sign failed


When trying to run FLUENT in network parallel using ssh you receive the following error:<br><br>bad fd<br>ssh_keysign: no reply<br>key_sign...

POLYFLOW - can we use more than one species to model coextrusion between more than 2 streams?


A simple case involves four different entries with our different species that should be tracked. Each species is assigned the value 1 at one entry and the value 0 at the three other entries. Only...

POLYMAN - the listing file for a simulation cannot be displayed


When running a POLYFLOW simulation via POLYMAN, the listing file is not displayed on the screen. What should be done?<br>This trouble may occur when the simulation name is the same as the...

POLYDATA - imposing the contraint on global displacement only on the upstream part of the free jet?


When running a 3D direct extrusion case for which constraint on global displacement is required, this constraint can no longer be applied on the upstream part of the free jet. In other words, it...

POLYFLOW - "Polydata not licensed" / "Polyflow not licensed" ? What could be done and checked?


When this happens, what should be done or checked?<br>This could often be a licensing issue, which should be regarded onthe same way as for other Fluent products, and sould be solved...

Overlapping sources in Icepak


The issue is to how split power #'s in the case of overlapping sources in Icepak.<br>Overlapping surfaces are additive. In Icepak, if two objects intersect each other, the area/volume...

Changing Solving Settings on-the-fly


You send jobs through LSF queuing system in full batch (controlled by main journal file). Many times it has to wait in the queue for hours. In the middle of the job run, one could find that he/she...

Icepak: Computation of View Factors for S2S Radiation Heat Transfer


1. How can we compute radiation view factors within an enclosure, in Icepak.<br>2. How can we compute radiation view factors between exposed surfaces and the ambient envirobment, in...