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Problem meshing with Gambit

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Old   October 3, 2008, 09:00
Default Problem meshing with Gambit
  #1
Adrian
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Hi guys Im working with cars and I have a problem meshing with Gambit what happend is that when I mesh the wheel of the car appear cell with high skew >0.97 because there is a wedge between the wheel and the ground and I have bad cell in that zone Can anybody help with how to solve that kind of problem? I would like to thank you to you all greetings Adrian
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Old   October 3, 2008, 09:57
Default Re: Problem meshing with Gambit
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doki
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well that means the mesh at the region is not sufficinetly enough fine or even the strategy for meshing that area is not appropriate. you can check both reasons. but I guess is is better to simplify the geometry somehow. also, you can decompose the domain more in the bad quality region.
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Old   October 3, 2008, 21:06
Default Thank you doki but...
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Adrian
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Thank you so much doki for help me ..I would tell you that I tryed to mesh that wedge area I mean between the wheel and floor of the car so what I did was first with a very little cell and the problem increase second I tryed to increase the cell in that zone and I realise that the bad cells > .97 decrease but the cell are big so Iīm confuse I donīt use any size function y that zone neither size function curvatura
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Old   October 5, 2008, 05:12
Default Re: Thank you doki but...
  #4
SA
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use triprimtive mesh topoly
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Old   October 6, 2008, 01:46
Default THANK U DHOKI WHENU SAY MORE CELL/ DECOMPOSE FURTH
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shashi
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I am also facing similar problem. sir , i am dealing with similar problrm with complex volume where face changes from circular to semi circular and then rectagular. ^though i created faces but some faces are showing skewness > .97. Is it advisable to continue or increse number of cell. further when doing volume meshing, can we continue for skewness > .97.

what is the best way to decompose the geometry
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Old   October 6, 2008, 10:57
Default Problem meshing with Gambit
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doki
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well regarding your questions, firstly I can not get the exact problem you mention. But as a general rule, finer meshes can sustain boundary integrity. But this may led to some problems, e.g. the number of mesh. I think the problem might occur when meshing an extremely narrow area; which is more experienced in complex cases. and to avoid this problem, you should either increase the near-surface meshes or simplify the geometry (if possible). there is no general rule about the decomposition of domain. that is a highly case-sensitive procedure.
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Old   October 6, 2008, 11:36
Default Re: Thank you Doki again...
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Adrian
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Thank you Doki for help me I will try to mesh increasing tha cell in that area I will see what happend and I will tell later Thank matey Adrian
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Old   October 7, 2008, 07:47
Default Re: Thank you Doki again...
  #8
shashi
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Thanks Mr Doki, but what about skewness greater than .97, can I continue or refine/decompose it.

a volume has two lateral faces , one with circular and another with rectangle. how to mesh, kindly advise
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Old   October 7, 2008, 08:39
Default Re: Thank you Doki again...
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doki
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refining the mesh can even worsen the situation. that is not a case to be clearly resolved! geometry complexity is an initiator for the mesh poor quality. the more zones you have, the better quality meshes you can get.
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