[Gmsh] Can I create a mesh with brick elements using Gmsh

[Jianan Zhang]

Hi, McBain,

Thanks for the reply.
Yes, by crick I mean the rectangular brick element, i.e., hexahedral aligned with the Cartesian axes shown as follows,
[Inline image OWAPstImg837331]

Basically, the mesh I want to create is a 3D hyperrectangular but with a small 3 hyperrectangular deleted from it. Something like this:
[Inline image OWAPstImg378831]
Note that the smaller one should be deleted from the bigger one, and I want the remaining part to be meshed with brick elements. Currently, with the GUI of Gmsh, I can create a geometry after performing that subtraction, then I click Mesh->3D to get a mesh file. But I can only get a mesh either with tetras or with hexas, not bricks, something like this
[Inline image OWAPstImg741560]  [Inline image OWAPstImg915842]



Is is possible to generate such a mesh with Gmsh' GUI? Or I need to use  Gmsh's own scripting language, using Extrude, Layers, and Recombine as you said?

Best regards
Jianan Zhang


________________________________
From: G. D. McBain <gdmcbain at protonmail.com>
Sent: Friday, December 22, 2017 5:20:36 AM
To: Jianan Zhang; gmsh at onelab.info
Subject: Re : [Gmsh] Can I create a mesh with brick elements using Gmsh


Bricks are hexahedral but by brick do you mean hexahedra aligned with the Cartesian axes? If so then yes, depending on the geometry. The simplest way is using Extrude, Layers, and Recombine.
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