# T-junction hexahedral gambit meshing (same radius)

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 June 9, 2008, 09:56 T-junction hexahedral gambit meshing (same radius) #1 Florence Guest   Posts: n/a Hello I have to mesh a T-junction composed of two cylinders with the same radius. I want to get hexahedral elements for my mesh. I don't know how I have to decompose my geometry. I would like to get some ideas. Thank you very much Florence

 June 9, 2008, 15:15 Re: T-junction hexahedral gambit meshing (same rad #2 HSeldon Guest   Posts: n/a Hi Florence. Go to tutorial nş3 in Gambit documentation the title is something like "3 pipe junction". There you´ll have a good explanation. Good luck!

 June 10, 2008, 02:48 Re: T-junction hexahedral gambit meshing (same rad #3 Florence Guest   Posts: n/a Hello HSeldon Thank you but I have already done this tutorial and I tried to inspire myself with it, but I met an error of gambit. I want to mesh a logical tetrahedra with the Tet Primitive Scheme but Gambit says me that the connectivity of my volume doesn't allow the Tet Primitive Scheme. I tried to disconnect the faces of my volume, but it didn't work. I searched on books what are the connectivity conditions for Tet Primitive Scheme, no success. I don't know how to deal with this error. Thanks Florence

 June 11, 2008, 17:31 Re: T-junction hexahedral gambit meshing (same rad #4 HSeldon Guest   Posts: n/a Did you try meshing the central volume of the intersection and then mesh the rest with hex cooper scheme? Take care.

 June 11, 2008, 17:43 Re: T-junction hexahedral gambit meshing (same rad #5 HSeldon Guest   Posts: n/a A piece of text taken from Gambit documentation, hope this helps! The Tet Primitive volume meshing scheme applies only to volumes that constitute logical tetrahedra. To constitute a logical tetrahedron, a volume must include only four sides, each of which constitutes a logical triangle. Cya

 June 12, 2008, 02:49 Re: T-junction hexahedral gambit meshing (same rad #6 Florence Guest   Posts: n/a Hello HSeldon Finally, I found a way to solve my problem. I split my intersection volume with three "cylinders" and then I used cooper scheme in the good order. _______________________________________ | | | | | | | /\ | | _________________ ____________________ | | | | __ | | | | Here a scheme the decomposition I used. The radius are the same. I hope my scheme won´t be destroy. Thank you for your help Florence

 January 5, 2010, 07:27 #7 New Member   joe star Join Date: Oct 2009 Posts: 9 Rep Power: 9 I know its quite an old post but I'm interested to know how you managed to mesh the pipe t junction using the cooper scheme. Any help would be much appreciated

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