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Adrian October 3, 2008 09:00

Problem meshing with Gambit
 
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

doki October 3, 2008 09:57

Re: Problem meshing with Gambit
 
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.

Adrian October 3, 2008 21:06

Thank you doki but...
 
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

SA October 5, 2008 05:12

Re: Thank you doki but...
 
use triprimtive mesh topoly

shashi October 6, 2008 01:46

THANK U DHOKI WHENU SAY MORE CELL/ DECOMPOSE FURTH
 
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

doki October 6, 2008 10:57

Problem meshing with Gambit
 
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.

Adrian October 6, 2008 11:36

Re: Thank you Doki again...
 
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

shashi October 7, 2008 07:47

Re: Thank you Doki again...
 
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

doki October 7, 2008 08:39

Re: Thank you Doki again...
 
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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