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Lack of RAM to visualize a big mesh. How can I do? |
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March 21, 2013, 03:33 |
Lack of RAM to visualize a big mesh. How can I do?
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#1 |
Senior Member
Samuele Z
Join Date: Oct 2009
Location: Mozzate - Co - Italy
Posts: 520
Rep Power: 18 |
Dear All,
I have a big mesh 12.5M cells and I have performed a simulation (using simpleFoam first and then adjointShapeOptimizationFoam). Everything seems to be ok, until when I try to visualize my data. Because of a lack of memory, paraview crashes. Is there a way to visualize such a big field of results? Thanks a lot, Samuele |
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March 21, 2013, 03:42 |
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#2 |
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Anton Kidess
Join Date: May 2009
Location: Germany
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Do you really need to see the whole domain? Either just look at a subset without reconstructing, or create some slices beforehand using the sample utility.
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March 21, 2013, 03:51 |
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#3 |
Senior Member
Samuele Z
Join Date: Oct 2009
Location: Mozzate - Co - Italy
Posts: 520
Rep Power: 18 |
Actually, visualizing the whole domain would be the best way. Isn't there a way to see the domain in low-definition?
If this is not possible, I'll use a workaround with sets. Thanks a lot, Samuelel |
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March 21, 2013, 04:06 |
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#4 |
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Anton Kidess
Join Date: May 2009
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You could indeed make a coarser mesh, and then use mapFields to project your solution on the coarse mesh.
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*On twitter @akidTwit *Spend as much time formulating your questions as you expect people to spend on their answer. Last edited by akidess; March 21, 2013 at 04:07. Reason: Language, spelling |
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March 21, 2013, 04:09 |
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#5 |
Senior Member
Samuele Z
Join Date: Oct 2009
Location: Mozzate - Co - Italy
Posts: 520
Rep Power: 18 |
This is a great idea, but just for visualization, at the end.
But I need some calculations, first (e.g. I have to evaluate a certain function on a surface and I can not use a coarse mesh). Anyway, this is a great advice I'll use for the final visualizations. Thanks a lot |
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March 24, 2013, 06:39 |
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#6 | ||
Assistant Moderator
Bernhard Gschaider
Join Date: Mar 2009
Posts: 4,225
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Quote:
- have you tried both readers (the built-in one as well) - Before clicking the button that actually loads the case have you tried deselecting all fields except one (or even deseleceting all to see if at least the mesh fits into memory) - the "para" in Paraview stands for "parallel". It's a long time since I done it, but if I remember it correctly you've got to start pvserver (not paraview) in parallel and then start paraview regularly and "Connect" to the pvserver. Google around there are presentations about this Quote:
Anyway: for quantitative analysis I'd prefer an option that is built only on OF to Paraview. Not because paraView is bad, but because it does its own interpolation, triangulation etc. With OF-native solutions (that includes swak) you use the values "as the OpenFOAM-solver saw them"
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