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• Regarding the surface mesh

Posted by on October 1, 2023 at 10:35 pm

I have some doubts in Meshing and Boundary conditions :

1.As u have told in the course that 2D cell types are of only two viz. triangle and quadilateral. Then how it is becoming possible that tetrahedral/hexahedral meshing is happening at the surface (as surface is a 2D space)as both these are 3D cell types and hence meshing can be done with these cells inside the bulk (which is a 3D space) only of the fluid domain .Same happened in Poly-hexcore mesh were the meshing at the surface was done by polyhedra mesh, which is again a 3D cell type.

2. Does the condition of fluid-fluid boundary types from ‘wall’ to internal meant that that the real wall will now be considered as a part of fluid (which is static as wall was static) or something else ?

replied 8 months, 2 weeks ago 2 Members · 3 Replies
• 3 Replies
• Sandeep

October 1, 2023 at 11:21 pm

2D meshes are usually triangles or quad or poly which is created by merging triangles. These are the faces of 3D cell on the surface. And Polyhedras are created by merging tetrahedras.

In simulations we may have to keep some surfaces between two fluid zones, for example, to distinguish between and rotating part and a stationary part etc. In such case we need to keep it as interior cells (interface). Also, additional interiors are kept for special monitoring purposes. Otherwise, it will be treated as a wall by default.

• abhishek_k

Member
October 6, 2023 at 7:04 pm

By faces of 3D cells on the surface you mean the 3D cell is inside and its face is on the surface ?