This question is regarding using GiD (v12.0.6) to pre-process for Tdyn / SeaFEM (v13.6.4) for a Seakeeping analysis.
After importing surfaces from Rhino and applying boundary conditions, body data, etc, I need to mesh.
When I Generate Mesh, I only get surface elements which do not work with SeaFEM. 4-node tets are required. I realize that I need to mesh a volume, yet all the SeaFEM tutorials show that the surfaces can be meshed (ie require smaller elements on a free surface near a body, etc), and then a volume mesh would be generated.
I believe there is some difference between the GiD versions in the tutorials and the one I'm using.
Does anyone have any advice or can point me to a resource which would explain this process?
Thank you very much in advance.
-Mike
Meshing volumes from a group of surfaces...
Moderator: GiD Team
Re: Meshing volumes from a group of surfaces...
Answered by Compass IS http://www.compassis.com :
"As you may already know, the latest version of SeaFEM (13.6) includes two main type of solvers: a linear frequency domain BEM solver and a time domain FEM solver.
I assume you are using the second option to conduct your tests. In that case, the solver requires to generate a mesh of the volume of water around the object. This means that you must generate the volume and not only the bottom, body, and outlet boundaries.
If the geometry you have generated with Rhino is 'water-tight' you can easily create a volume in SeaFEM by using the option 'Geometry->Create->Volume->By Contour'.
Finally, Tutorials manual (available to download at http://www.compassis.com/compass/en/Soporte) could help you to understand how to generate a model from scratch".
"As you may already know, the latest version of SeaFEM (13.6) includes two main type of solvers: a linear frequency domain BEM solver and a time domain FEM solver.
I assume you are using the second option to conduct your tests. In that case, the solver requires to generate a mesh of the volume of water around the object. This means that you must generate the volume and not only the bottom, body, and outlet boundaries.
If the geometry you have generated with Rhino is 'water-tight' you can easily create a volume in SeaFEM by using the option 'Geometry->Create->Volume->By Contour'.
Finally, Tutorials manual (available to download at http://www.compassis.com/compass/en/Soporte) could help you to understand how to generate a model from scratch".