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September 30, 2013, 13:18 |
Error in exporting mesh
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#1 |
Senior Member
Bobby
Join Date: Oct 2012
Location: Michigan
Posts: 454
Rep Power: 15 |
Dear Buddies
I have created a wedge-typed mesh in gambit. Now I want to export it into fluent . Whenever I try to export it; this error comes: Code:
No entities were found for mesh export. Errors were found during export. Export file was not created. Would somebody PLZ help me what is the problem? Regards BobiMesh.jpg |
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October 1, 2013, 00:50 |
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#2 |
Super Moderator
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 3,297
Rep Power: 41 |
Do you have volume elements? (When I see the color of your mesh I would say yes)
Did you receive any error while meshing? Do you have any BC? (export should work also if you didn't set any BC)
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In memory of my friend Hervé: CFD engineer & freerider |
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October 1, 2013, 05:19 |
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#3 |
Senior Member
Bobby
Join Date: Oct 2012
Location: Michigan
Posts: 454
Rep Power: 15 |
Hi Maxime
1- I swept my faces with their mesh along a specified edge and then deleted the edge. 2- No error appeared during mesh generation. 3- Yes. Maybe its because of my BC. I set periodic boundary for upper and lower surfaces of the wedge. These faces in OpenFoam adopt front and back wedges that are empty (Cause as you might know this wedge is a cut from a cylinder). However I don't know what type in Gambit should I define. Regards Bobi |
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October 1, 2013, 05:33 |
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#4 |
Super Moderator
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 3,297
Rep Power: 41 |
OF apart, try to delete the periodic BC, and export the mesh.
Periodic BC needs linked mesh
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In memory of my friend Hervé: CFD engineer & freerider |
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October 2, 2013, 01:28 |
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#5 |
Senior Member
Bobby
Join Date: Oct 2012
Location: Michigan
Posts: 454
Rep Power: 15 |
Hi Maxime
Thanks for your hint. However, Would you PLZ hint me instead of periodic BC, what kind should I assign for upper and lower surfaces which in OF they are empty wedges. Because For instance if I assign them wall, it affects the solution or If I consider them outlet; I think it's unreal cause its a cut from a real cylinder and these surfaces are not outlet. So I am a bit confused what type of BC should I assign for them? Regards Bobi |
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October 3, 2013, 01:42 |
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#6 |
Super Moderator
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 3,297
Rep Power: 41 |
as I said, previously to solve the BC issue in OF, try to solve the problem from mesh export.
Did you now succeed to export the mesh properly (without periodic BC)?
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In memory of my friend Hervé: CFD engineer & freerider |
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October 3, 2013, 02:06 |
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#7 |
Senior Member
Bobby
Join Date: Oct 2012
Location: Michigan
Posts: 454
Rep Power: 15 |
Hi Maxime
It was as you said, I deleted the Periodic BCs and now successfully exported the mesh. However, Now the upper and lower surfaces have no BC. Do you have any hint for me in this step? I mean let them to be as they are (no BC) or anything else? Regards Bobi |
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October 3, 2013, 03:32 |
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#8 |
Super Moderator
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 3,297
Rep Power: 41 |
ok it means the problem comes from periodicity.
And as I said, periodicity in Gambit has one rule: both surfaces have to be mesh linked. So delete your volume mesh, link both surface meshes, adn remesh volume https://www.sharcnet.ca/Software/Gam...mesh_face_link Then apply BC and export mesh
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In memory of my friend Hervé: CFD engineer & freerider |
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October 3, 2013, 05:52 |
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#9 |
Senior Member
Bobby
Join Date: Oct 2012
Location: Michigan
Posts: 454
Rep Power: 15 |
Hi Maxime
I will try as you said; thanks for your quick reply and also the link. Regards Bobi |
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