DynamicMesh - Move internal points
 

Hallo foamers,

actually I am programming an y+ adaption for OpenFoam. I need a tool, which manipulates the mesh by making the thickness of the first boundary layer smaller if there is detected y+>1.

I am able to detect that vertices with toposet:

• select all faces with y+>1
• select all cells with that selected faces
• select points of the selected cells (first boundary layer)
• deselect points of the boundary face

The result is a selection of points of the first boundary cells, but not points directly of the boundary (they have to stay fixed). Now I want to move them down and want to do it with dynamicMesh library.


Problem: I didn't find in the web a tutorial, how to move internal points (not boundary points) of the mesh. Do anybody knows how it works?


Thanks for help,
Nucat

If you look at the layeredEngineMesh code, you can see there is code that moves certain mesh points to a new position based on the calculated crank angle. You will need to do something similar, although I don't quite know how you would determine the new position.

It would have to be some kind of function that finds distance to the nearest point on a boundary patch, then takes a fraction of the distance along the vector to the nearest point on the patch and moves the new point to that position (like half the distance?). Or just a set distance along that line. There are some built in functions like that in meshTools and other libraries. Its been a while since I've had to do anything with them.

Hey,

thanks for reply. I think I will solve that problem by myself with toposet and python ))