# Combination of Hex and Tet-Elements in GAMBIT

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 October 25, 2008, 07:34 Combination of Hex and Tet-Elements in GAMBIT #1 Sebastian Gatzka Guest   Posts: n/a Hello World. I'm trying to mesh a volume. Unfortunately (or as a matter of fact) the computational domain contains a radius. I still want to use hexahedron elements in the main part of the computational domain, so I decided to mesh the part near the radius with tetrahedron elements to deal with the radius. Have a look at the picture, which will illustrate the problem: http://therealsega.th.funpic.de/open...tetra_area.jpg The complete domain is still defined as one volume (and a volume group as well). So, how is it possible to tell GAMBIT to mesh with tetrahedron elements in the designated area and to mesh with hexahedron element in the rest? Maybe I have to split the domain, but I don't know how this can be achieved. Thanks for your help. Sebastian

 October 27, 2008, 13:07 Re: Combination of Hex and Tet-Elements in GAMBIT #2 JB Guest   Posts: n/a Hi, Correct, you should split your domain in 3 volumes. I see from the picture that you already defined 2 faces. Just split your main volume with those faces geometry -> volume -> split volume -> split with: faces (real) BTW: I'm afraid your mesh will have poor quality if you fill the in between volume with tet elements.. I hope this helps! /JB

 October 27, 2008, 14:59 Re: Combination of Hex and Tet-Elements in GAMBIT #3 Sebastian Gatzka Guest   Posts: n/a Thank you JB. I toyed around with GAMBIT and found a way to created the desired mesh. http://therealsega.th.funpic.de/openfoam/finalmesh.jpg I think in this combination the quality is not as bad as it would have been in the first approach ... Or do you think different?

 October 28, 2008, 01:45 Re: Combination of Hex and Tet-Elements in GAMBIT #4 mAx Guest   Posts: n/a switch your tetra-volume into pave-volume, and you will have only hexa-

 October 28, 2008, 05:52 Re: Combination of Hex and Tet-Elements in GAMBIT #5 JB Guest   Posts: n/a Yeah I think it was a good Idea to do what you did. You improved the mesh quality for sure. Regarding element type, it really depends on what you're simulating. Cheers /JB

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