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March 6, 2015, 10:43 
meshing of a compound volume in GMSH

#1 
New Member
shawn
Join Date: Mar 2015
Posts: 3
Rep Power: 2 
Hi there,
Could anybody please tell me why gmsh isn't creating any mesh for the physical volume 300 in my attached .geo file. 300 is a compound volume consisting 2 other volumes 107 and 109 into it and sharing a common surface 84. Regards Shawn 

March 6, 2015, 10:52 

#2 
Senior Member
Alexey Matveichev
Join Date: Aug 2011
Location: Nancy, France
Posts: 1,304
Rep Power: 23 
Hi,
I think attached geo file is somehow broken as there is no points inside, here is Gmsh output: Code:
Info : Running 'gmsh  example11JV.geo' [Gmsh 2.8.5, 1 node, max. 1 thread] Info : Started on Fri Mar 6 15:51:56 2015 Info : Reading 'example11JV.geo'... Error : Unknown curve 2 Error : Unknown curve 1 Error : Unknown curve 4 Error : Unknown curve 3 Error : Unknown curve 2 Error : Unknown curve 6 Error : Unknown curve 27 Error : Unknown curve 37 Error : Unknown curve 27 Error : Unknown curve 28 Error : Unknown curve 33 Error : Unknown curve 35 Error : Unknown curve 37 Error : Unknown curve 38 Error : Unknown curve 41 Error : Unknown curve 302 Error : Unknown curve 14 Error : Unknown curve 39 Error : Unknown curve 301 Error : Unknown curve 13 Error : Unknown curve 6 Error : Unknown curve 51 Error : Unknown curve 45 Error : Unknown curve 47 Error : Unknown curve 46 Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition Error : Wrong 7th argument in SVD decomposition Error : Wrong 6th argument in SVD decomposition ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value ** On entry to DGESVD parameter number 6 had an illegal value Info : Done reading 'example11JV.geo' Info : Stopped on Fri Mar 6 15:51:56 2015 

March 6, 2015, 11:03 

#3 
New Member
shawn
Join Date: Mar 2015
Posts: 3
Rep Power: 2 
Hi alexeym,
I don't know why this has broken. However, I have attached the file again. Thanks and regards 

March 9, 2015, 07:29 

#4 
Senior Member
Alexey Matveichev
Join Date: Aug 2011
Location: Nancy, France
Posts: 1,304
Rep Power: 23 
Hi,
Not quite sure if I correctly understood the geometry in the geofile but it seems that you are trying to mesh overlapping volumes. AFAIK Gmsh can not do this. 

March 12, 2015, 11:45 

#5 
New Member
shawn
Join Date: Mar 2015
Posts: 3
Rep Power: 2 
Hi alexeym,
Thank you so much for your reply. I have got the solution.Actually, it was about the embedded surfaces. Volume 200 is embedded into volume 300. Also it is sharing one of the surface of volume 300. That's why when we will define volume 300 we have to count all the surfaces of volume 200 into the surface loop of 300 except the one which is sharing the common surface of 300. Since, volume 200 is not totally inside the volume 300 we have to skip the surface loop of volume 200 into the volume 300 definition. Something like: Surface Loop for volume 200 : 200 = {1, 2, 3, 4, 5, 6}; Volume(200) = {200}; Surface 6 is sharing the surface 9 of volume 300. Hence, Surface Loop for volume 300: 300 = {7, 8, 9, 10, 11, 12, 13, 1, 2, 3, 4, 5}; Volume(300) = {300}; Then it will create mesh also for volume 300. 

Tags 
compound volume, geometry, gmsh 
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