[snappyHexMesh] snappyHexMesh: How can be avoided polyhedra

idrama · March 18, 2010, 05:50

Hello Foamers,

certainly a simple question: How can I avoid that snappyHexMesh generates polyhedrai.e. I just want a purely mesh consisting of hexhedra.

Cheers in advance!

mediode · March 19, 2010, 09:34

I am not too familiar with it, but I think you have to control the refinement. The refinment level should be even all over your domain. Another way would be to set a background mesh with your desired resolution and suppressing refinment totally, but the might create a huge amount of data.

cheers
m+

File · September 25, 2013, 09:16

Hi,

I need the same thing so just the information if you made some progress and if yes could you please describe how you did it??

Cheers

haakon · September 25, 2013, 09:48

Unfortuneatly I do not think that it is possible to avoid polyhedras all together when using sHM. It's just the way it works. Even tough you can avoid many polyhedras by specifying uniform mesh density outside your geometry, I think that it still produces polyhedras when cutting cells and snapping to surfaces.

Anyways, if you need a pure hex mesh you are better of searching for an alternative grid generator. I know that GridPro can make some really amazing block-structured grids, however, it require much user training.

One small question: why do you need a grid withouut polyhedral cells?

File · September 26, 2013, 05:12

Tnx Hakon, I actually need structured mesh because I need it later to implement my own code on it after calculating flow field in OpenFOAM

Tobi · September 27, 2013, 06:35

Hi,

ANSYS-ICEM can build only hexaedral meshes too but it could be very difficult.

Maybe the following tool will be good for your - depend on your geometry

http://www.cfd-online.com/Forums/ope...a-release.html

Regard
Tobi

March 18, 2010, 05:50	snappyHexMesh: How can be avoided polyhedra	#1
idrama Senior Member Claus Meister Join Date: Aug 2009 Location: Wiesbaden, Germany Posts: 241 Rep Power: 17	Hello Foamers, certainly a simple question: How can I avoid that snappyHexMesh generates polyhedrai.e. I just want a purely mesh consisting of hexhedra. Cheers in advance!

March 19, 2010, 09:34	refinement	#2
mediode New Member mediode Join Date: Mar 2009 Posts: 27 Rep Power: 17	I am not too familiar with it, but I think you have to control the refinement. The refinment level should be even all over your domain. Another way would be to set a background mesh with your desired resolution and suppressing refinment totally, but the might create a huge amount of data. cheers m+

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September 25, 2013, 09:16		#3
File New Member Filip Gjetvaj Join Date: Mar 2013 Location: Montpellier, FR Posts: 17 Rep Power: 13	Hi, I need the same thing so just the information if you made some progress and if yes could you please describe how you did it?? Cheers

September 25, 2013, 09:48		#4
haakon Senior Member Join Date: Dec 2011 Posts: 111 Rep Power: 19	Unfortuneatly I do not think that it is possible to avoid polyhedras all together when using sHM. It's just the way it works. Even tough you can avoid many polyhedras by specifying uniform mesh density outside your geometry, I think that it still produces polyhedras when cutting cells and snapping to surfaces. Anyways, if you need a pure hex mesh you are better of searching for an alternative grid generator. I know that GridPro can make some really amazing block-structured grids, however, it require much user training. One small question: why do you need a grid withouut polyhedral cells?

September 26, 2013, 05:12		#5
File New Member Filip Gjetvaj Join Date: Mar 2013 Location: Montpellier, FR Posts: 17 Rep Power: 13	Tnx Hakon, I actually need structured mesh because I need it later to implement my own code on it after calculating flow field in OpenFOAM

September 27, 2013, 06:35		#6
Tobi Super Moderator Tobias Holzmann Join Date: Oct 2010 Location: Tussenhausen Posts: 2,708 Blog Entries: 6 Rep Power: 51	Hi, ANSYS-ICEM can build only hexaedral meshes too but it could be very difficult. Maybe the following tool will be good for your - depend on your geometry http://www.cfd-online.com/Forums/ope...a-release.html Regard Tobi