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[snappyHexMesh] SnappyHexMesh not generate mesh first time |
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August 24, 2008, 07:43 |
SnappyHexMesh not generate mesh first time
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#1 |
Member
Marco Moscaritolo
Join Date: Mar 2009
Location: Bergamo, Italy
Posts: 33
Rep Power: 17 |
Hi, I test snappyHexMesh with tutorial and work fine, after that I'm starting to test it with another object into domain.
Mesh generation On web I find a diablo *.lwo model, with blender i generate stl (using script posted by Andrew Kink ad address http://www.cfd-online.com/OpenFOAM_D...5095#POST25114 ). After first stl generation i check stl with admesh and using it to correct error on mesh and move it; now I have my correct STL model. Case setting After STL creation I genereate a simple domain with blockMesh (no boundary specs, now I'm just check mesh creation), and write my /system/snappyHexMeshDict where I specificate info for mesh creation (see link on bottom for complete case) Problem description If I run snappyHexMesh it fall after some step, and not complete the mesh generation. I try to enable debug function into snappyHexMeshDict (debug = 1) and it write mesh for time 2 and 3, and after still fails, but if I restart snappyHexMesh after first time (if debug = 1) it complete mash generation without problem (start from last time step write on case directory) I test it with different mesh refinement, and into every case error occur (on different time step for every case, in accord with mesh refinement specs). Case download: You can find my case (with stl generate and correct) on address: http://www.cfditalia.org/files/tmp/diablo.tar.gz Run it: tar -xzf diablo.tar.gz blockMesh -case diablo checkMesh -case diablo snappyHexMesh -case diablo # error (write some time step) snappyHexMesh -case diablo # generate emsh Someone can explain me where's my error? Why if first time fall after work fine? I think problem is on saving data, after saving some info change (approximate points position?) and when restart work fine. Thanks in advance Marco PS. sorry for my bad english :P |
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August 24, 2008, 15:44 |
other info
I use OpenFOAM 1.5
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#2 |
Member
Marco Moscaritolo
Join Date: Mar 2009
Location: Bergamo, Italy
Posts: 33
Rep Power: 17 |
other info
I use OpenFOAM 1.5 32bit on AMD 1.7GHz / 512MB ram with Linux Ubuntu 8.04. Alberto P write me this case work fine with OF1.5 64bit |
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August 25, 2008, 18:16 |
Same problem here:
openSUSE 1
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#3 |
New Member
Josef F. Buergler
Join Date: Mar 2009
Posts: 16
Rep Power: 17 |
Same problem here:
openSUSE 10.3 on Sun Ultra M2 (64bit) with OpenFOAM 1.5 patched: runs fine openSUSE 10.3 on IBM T43p (32bit) with OpenFOAM 1.5 patched: same behaviour as mentioned by Marco Moscaritolo |
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August 26, 2008, 05:14 |
I ran your case in 64 bit and
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#4 |
Senior Member
Mattijs Janssens
Join Date: Mar 2009
Posts: 1,419
Rep Power: 26 |
I ran your case in 64 bit and 32 bit mode. Both meshing runs complete without problems.
Why do you have minimum pyramid volume set to 1e-3? This is quite a large value compared to the cell volumes so leaves very little scope to the snapper to morph to your surface. |
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August 26, 2008, 08:08 |
@Mattijs: this is a sample to
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#5 |
Member
Marco Moscaritolo
Join Date: Mar 2009
Location: Bergamo, Italy
Posts: 33
Rep Power: 17 |
@Mattijs: this is a sample to study snappyHexMesh tool, this mesh is not a fine mesh (I have other snappyHexMeshDict with param for fine mesh), but my primary problem is into mesh creation error.
Bye Marco |
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