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[snappyHexMesh] Empty cellZones, faceZones and pointZones files after mesh merging |
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#1 |
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 732
Rep Power: 23 ![]() |
I am simulating fluid mixed by an impeller. Here is what I did
1. I divided the domain in to two parts: a. Region close to the impeller blades. b. The mixing tank (minus the region described by 'a'). 2. Created two meshes. 3. Use mergeMesh operation to merge the mesh. Now when I check the merged mesh the cellZones, faceZones and pointZones files are empty. What do you think is going wrong? Two more questions about the stl file. 1. Should the stl file be exported as one surface or exported as one file containing several surfaces (inlet, outlet, wall etc)? 2. If we export the stl file as one surface how do we generate patches (inlet, outlet, wall etc)? |
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#2 |
Senior Member
Niels Gjoel Jacobsen
Join Date: Mar 2009
Location: Copenhagen, Denmark
Posts: 1,903
Rep Power: 37 ![]() ![]() |
Hi Vasava,
Did you have any cell-, face- or pointZones in the two original meshes? The thing is that these zones are something, which you need to create, and which serve particular purposes depending on your solver. Hence, if you did not have any before the merging, then it is just fine that they are empty. Their presence is probably due to the merging utility, which writes all fields/information potentially present. Kind regards Niels |
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#3 | |
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 732
Rep Power: 23 ![]() |
Quote:
Thanks for the answer. |
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#4 |
Senior Member
Niels Gjoel Jacobsen
Join Date: Mar 2009
Location: Copenhagen, Denmark
Posts: 1,903
Rep Power: 37 ![]() ![]() |
Hi Vasava,
I didn't notice the question about the stl-surfaces. Are you using snappyHexMesh to generate the meshes? And what are the problems that you encounter? I have generated simple meshes with both one and multiple stl-surfaces, so neither should be a problem. In case you only have one stl-surface, you can look into Code:
createPatch -help Code:
<OFPATH>/applications/utilities/mesh/manipulation/createPatch Kind regards Niels |
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#5 | |
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 732
Rep Power: 23 ![]() |
Quote:
I am now following the tutorial 'propeller' to see if I can find some hints. Thanks for your answer. |
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#6 |
Senior Member
Niels Gjoel Jacobsen
Join Date: Mar 2009
Location: Copenhagen, Denmark
Posts: 1,903
Rep Power: 37 ![]() ![]() |
Hi Vasava,
Let me just stress one thing: If your solver does not need cell-, face- or pointZones, then it is perfectly fine that these files are empty. Good luck, Niels |
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Thread | Thread Starter | Forum | Replies | Last Post |
Mesh hierarchy | amtri | OpenFOAM Post-Processing | 0 | February 4, 2011 18:25 |