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December 31, 2014, 05:01 |
Merge multiple regions to use simpleFoam
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#1 |
New Member
Join Date: May 2013
Posts: 23
Rep Power: 13 |
Hello all,
I would like an advice to execute a mesh operation on openfoam. I am working only with fluid regions and want to execute simpleFoam solver. I have got a mesher which can directly export to openfoam . But instead of exporting only one mesh with the different regions stored into the "cellZones" file (which is what I want), it exports one mesh for each region, and without creating a "cellZones" file So, do you know a quick workaround to perform this operation ? What can work I think is *Add a minor mesh to the master mesh using mergeMeshes *Use a topoSetDict file to write the different cellZones What do you think about it ? It may work but it will be very painful and time consuming as I have more than 15 regions to merge !! Is there a quicker way ? In fact if I think about it, what I want to do is the exact inverse operation of splitMeshRegions ! Or maybe I should use chtMultiRegionSimpleFoam ? I have never used it ... Is it as fast as using the simpleFoam solver? |
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December 31, 2014, 09:23 |
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#2 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,981
Blog Entries: 45
Rep Power: 128 |
Hi Arnaud6,
I see that this issue is somewhat related to this thread: http://www.cfd-online.com/Forums/ope...-boundary.html Let me start in reverse order:
Bruno |
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December 31, 2014, 12:48 |
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#3 |
New Member
Join Date: May 2013
Posts: 23
Rep Power: 13 |
Hi Wyldckat
Thanks for being everywhere on the forum and giving great advice ! So, from what you are saying, I will stick to using mergeMeshes to build a master mesh then running simpleFoam. In fact I have just seen that I can run mergeMeshes <masterCase> <addCase> -addRegion region1 -addRegion region 2 .... And specifying all the regions to merge in one command. So that I need to run the utility only once ! And after, as I need the cellZones to apply on them different treatment on the fvOptions file (I need an MRF cellZone), I will use the setSet I think. Do you know if from an inside point of a region, I can select select all the cells of the region ? That would do the trick ! For your last question, unfortunately, I have almost no control on the mesher . And it is only exporting the multi region to multiple meshes instead of exporting only one mesh with multiple cellZones ! I will try with the scripting and let you know ! |
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December 31, 2014, 13:04 |
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#4 | |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,981
Blog Entries: 45
Rep Power: 128 |
Quote:
Code:
setSet -region region_name Problem is that when the merging process is used, I don't know if the cellSetZone will be translated accordingly, or not, to the new cell ID in the new merged mesh. |
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January 6, 2015, 12:27 |
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#5 |
New Member
Join Date: May 2013
Posts: 23
Rep Power: 13 |
Well it's strange, I have made some tests with mergeMeshes and openfoam complained about an imaginary missing boundary.
Sorry Wyldckat, I have abandonned this way of working for the moment and I am concentrating on playing in a different way. I ll let you know when I come back to this issue. |
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June 23, 2015, 11:29 |
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#6 | |
Senior Member
Join Date: Mar 2015
Posts: 250
Rep Power: 12 |
Quote:
how do you invert a set in OpenFoam? Thanks for your help, Kate |
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June 24, 2015, 03:48 |
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#7 |
Senior Member
Join Date: Mar 2015
Posts: 250
Rep Power: 12 |
Hello,
I got the answer from the openfoamwiki: Code:
setSet Command>cellSet younameit invert Command>quit Kate |
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Tags |
cellzones, chtmultiregionsimplefoam, mergemeshes, splitmeshregions |
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