[Gmsh] MVG with Gmsh for OpenFOAM

fportela · March 20, 2013, 04:00

Hello OpenFOAMers!

I am trying to generate a mesh of a MVG like this one: http://www.hindawi.com/journals/mse/2011/934982/

I have tried using Gmsh, but the quality of the mesh on the sides near the sharp angle is always very bad. The good thing about Gmsh is that I could easily prescribe cyclic boundaries.

Does any one have any tips for this kind of situation? Or on how to go around this bad cells issue?

wyldckat · March 25, 2013, 16:44

Greetings Felipe,

Does it have to be Gmsh? I ask this because if you are going to use OpenFOAM, you can use a few other meshers and auxiliary applications, such as:

SwiftBlock: http://openfoamwiki.net/index.php/Contrib/SwiftBlock
SwiftSnap: http://openfoamwiki.net/index.php/Contrib/SwiftSnap

Best regards,
Bruno

fportela · March 26, 2013, 03:57

Hi Bruno,

Thanks for the tips!

Indeed, there is no particular need to use Gmsh, it's just that I am more used to it.

I already tried using snappyHexMesh (with a procedure similar to that of SwiftSnap) but then I lose a bit of geometry detail... Also I got the feeling that the overall quality of the mesh decreases a lot (whilst when using Gmsh the problem is localized).

I will have a loop at SwiftBlock and see what I can manage!

Cheers

March 20, 2013, 04:00	MVG with Gmsh for OpenFOAM	#1
fportela Member Felipe Alves Portela Join Date: Dec 2012 Location: FR Posts: 70 Rep Power: 13	Hello OpenFOAMers! I am trying to generate a mesh of a MVG like this one: http://www.hindawi.com/journals/mse/2011/934982/ I have tried using Gmsh, but the quality of the mesh on the sides near the sharp angle is always very bad. The good thing about Gmsh is that I could easily prescribe cyclic boundaries. Does any one have any tips for this kind of situation? Or on how to go around this bad cells issue?

March 25, 2013, 16:44		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Greetings Felipe, Does it have to be Gmsh? I ask this because if you are going to use OpenFOAM, you can use a few other meshers and auxiliary applications, such as: SwiftBlock: http://openfoamwiki.net/index.php/Contrib/SwiftBlock SwiftSnap: http://openfoamwiki.net/index.php/Contrib/SwiftSnap Best regards, Bruno __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

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March 26, 2013, 03:57		#3
fportela Member Felipe Alves Portela Join Date: Dec 2012 Location: FR Posts: 70 Rep Power: 13	Hi Bruno, Thanks for the tips! Indeed, there is no particular need to use Gmsh, it's just that I am more used to it. I already tried using snappyHexMesh (with a procedure similar to that of SwiftSnap) but then I lose a bit of geometry detail... Also I got the feeling that the overall quality of the mesh decreases a lot (whilst when using Gmsh the problem is localized). I will have a loop at SwiftBlock and see what I can manage! Cheers