NEMOH

A subforum specific to the development of the OpenFoam-based workbenches ( Cfd https://github.com/qingfengxia/Cfd and CfdOF https://github.com/jaheyns/CfdOF )

Moderator: oliveroxtoby

cdlnet
Posts: 2
Joined: Sun Sep 16, 2018 5:24 pm

NEMOH

Postby cdlnet » Sun Sep 16, 2018 5:31 pm

Hi
I'm new to this forum. Just exploring how FreeCAD could be used for generating meshes for NEMOH BEM code. It needs quadrilateral panels and I can't see how to generate these in the meshing workbench. Maybe not possible, but would appreciate some comments. Thanks
thschrader
Posts: 1144
Joined: Sat May 20, 2017 12:06 pm
Location: Germany

Re: NEMOH

Postby thschrader » Mon Sep 17, 2018 4:37 pm

cdlnet wrote:
Sun Sep 16, 2018 5:31 pm
Hi
I'm new to this forum. Just exploring how FreeCAD could be used for generating meshes for NEMOH BEM code. It needs quadrilateral panels and I can't see how to generate these in the meshing workbench. Maybe not possible, but would appreciate some comments. Thanks
No, I dont think you can use the meshers from Freecad cfd-workbench (gmsh, snappyhexmesh, cfmesh)
to generate a (2D?) BEM-mesh the easy way. Openfoam uses a so called "polymesh", please see
OF-user-manual chapter 5.
http://foam.sourceforge.net/docs/Guides ... ide-A4.pdf
I had a short look at
https://lheea.ec-nantes.fr/logiciels-et ... 92863.kjsp
I need matlab for running NEMOH, is that true?
regards Thomas
cdlnet
Posts: 2
Joined: Sun Sep 16, 2018 5:24 pm

Re: NEMOH

Postby cdlnet » Tue Sep 18, 2018 9:46 am

Thanks Thomas. Yes, you need MATLAB or Octave to run NEMOH. As a BEM code it only needs the boundary surface. I guess most meshing tools assume 3D elements. I think I came across some discussions (can't find it now) about using gmsh to create quad meshes. Anyone got any experience of this? Thanks, Jonathan