Generating 3-D axisymmetric mesh using extrudeMesh

martyn88 · August 2, 2012, 09:13

Hi guys,

I am modelling an axisymmetric jet and would like to use extrudeMesh to convert a 2-D mesh into 3-D. I created a 2-D mesh in Fluent then used fluentMeshToFoam to convert it. I would now like to revolve this 2-D mesh 45 degrees about a symmetry axis, effectively making a 1/8th section.
The problem is I can't get extrudeMesh to work. It comes up with the following message:

--> FOAM FATAL IO ERROR:
cannot open file

file: /home/hugh/OpenFOAM/hugh-2.1.0/3d/jet_3d_extrude/system/extrudeMeshDict at line 0.

From function regIOobject::readStream()
in file db/regIOobject/regIOobjectRead.C at line 87.

I have looked at other threads and they say to run extrudeMesh from a separate directory to that which your 2-D mesh is stored and then call the 2-D directory in your extrudeMeshDict. I have done this but it still doesn't work. Could someone please help me!

Thanks

Hugh

Nucleophobe · August 3, 2012, 11:19

It looks like it can't find or open your extrudeMeshDict at all. What directory are you executing extrudeMesh from?

If your extrudeMeshDict is located at:
/home/hugh/OpenFOAM/hugh-2.1.0/3d/jet_3d_extrude/system/extrudeMeshDict

then you should be able to run extrudeMesh from
/home/hugh/OpenFOAM/hugh-2.1.0/3d/jet_3d_extrude/

Otherwise you might have file ownership properties. Maybe try
chmod 700 extrudeMeshDict

August 2, 2012, 09:13	Generating 3-D axisymmetric mesh using extrudeMesh	#1
martyn88 Member Hugh Ingham Join Date: Aug 2012 Posts: 35 Rep Power: 2	Hi guys, I am modelling an axisymmetric jet and would like to use extrudeMesh to convert a 2-D mesh into 3-D. I created a 2-D mesh in Fluent then used fluentMeshToFoam to convert it. I would now like to revolve this 2-D mesh 45 degrees about a symmetry axis, effectively making a 1/8th section. The problem is I can't get extrudeMesh to work. It comes up with the following message: --> FOAM FATAL IO ERROR: cannot open file file: /home/hugh/OpenFOAM/hugh-2.1.0/3d/jet_3d_extrude/system/extrudeMeshDict at line 0. From function regIOobject::readStream() in file db/regIOobject/regIOobjectRead.C at line 87. I have looked at other threads and they say to run extrudeMesh from a separate directory to that which your 2-D mesh is stored and then call the 2-D directory in your extrudeMeshDict. I have done this but it still doesn't work. Could someone please help me! Thanks Hugh

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August 3, 2012, 11:19		#2
Nucleophobe New Member Ken Join Date: Aug 2012 Posts: 24 Rep Power: 2	It looks like it can't find or open your extrudeMeshDict at all. What directory are you executing extrudeMesh from? If your extrudeMeshDict is located at: /home/hugh/OpenFOAM/hugh-2.1.0/3d/jet_3d_extrude/system/extrudeMeshDict then you should be able to run extrudeMesh from /home/hugh/OpenFOAM/hugh-2.1.0/3d/jet_3d_extrude/ Otherwise you might have file ownership properties. Maybe try chmod 700 extrudeMeshDict