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Exporting ICEM Tetra Grid to Fluent with Hexa-Core

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Old   August 24, 2007, 11:47
Default Exporting ICEM Tetra Grid to Fluent with Hexa-Core
  #1
Tim
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I've just recently started using ICEM Tetra/Prism and seem to be having problems getting my mesh files exported into Fluent. I import the geometry into ICEM in IGES format, tidy it up and name all the parts, mesh using the Octree method and then apply a hexa-core to the volume mesh using the Delauney approach. Smooth the mesh, check it for all possible errors and problems and then export in Fluent_V6 format .msh file.

The problem is that then when I try to read the grid into Fluent I get a read error. I've tried ACSII and binary formats and neither work. I've also found that importing the grid with a pure Tetra mesh (i.e. no hex's) does work. So I'm thinking that the problem is how Fluent interprets the Hexa-Core mesh topology.

If anyone has any ideas as to what I can do to correct this problem then any assitance would be very much appreciated.

Thanks, Tim
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Old   August 27, 2007, 09:47
Default Re: Exporting ICEM Tetra Grid to Fluent with Hexa-
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Felix
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Could you exactly quote the error message, please.
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Old   August 27, 2007, 11:21
Default Re: Exporting ICEM Tetra Grid to Fluent with Hexa-
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myron
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Have you gone through the Edit Mesh > Check Mesh functions? Those will often show any problems that might exist.
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Old   August 28, 2007, 03:53
Default Re: Exporting ICEM Tetra Grid to Fluent with Hexa-
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Tim
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Yes, I checked the mesh for a all errors and all of the possible problems. There were no errors in the grid but there were possible problems highlighted with Single-Edges, Multiple-Edges, Single-Multiple Edges and 2-Single Edges. But these were all in locations that were to be expected since the model is made up of flat plate entities. There were also some possible problems highlighted with Delauney violations. I don't know whether it's these that could be causing the problems and if so, how do you correct them?
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Old   August 28, 2007, 04:05
Default Re: Exporting ICEM Tetra Grid to Fluent with Hexa-
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Tim
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The exact error message appears as follows if I'm trying to read an ASCII format grid into Fluent. It reads slightly different for a binary grid.

> Reading "C:\Documents and Settings\tim\Desktop\Sample-Assembly6.msh"

253326 nodes.

675151 mixed cells, zone 73.

Error: read: face 1471627, zone 74.

Reading Faces: failed while reading section 13.

Clearing partially read grid.

Error: Read aborted dut to critical error.

Error Object: ()

Error: Error reading "C:\Documents and Settings\tim\Desktop\Sample-Assembly6.msh".

Error Object: #f
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