Unstructured meshing ( volume mesh)
 

I am doing volume mesh for a domain containing wind turbine blades. But the volume mesh is going inside the blade.
The procedure I am using is
compute mesh-->octree-->use existing mesh of the blade

How to overcome this problem

Hello,

Do not use the existing mesh, just use the geometry.

if I use the geometry instead of existing mesh then the blade mesh is not properly captured, the blade is having a zig-zag shape at trailing edge.

look in the help for:


ICEM CFD > Help Manual > Mesh > Global Mesh Setup > Volume Meshing Parameters > Tetra/Mixed


And there you will find the things you need

Yes, you might want to modify the edge criterion. I think the default of 0.2 is too large and geometry may not be properly captured if the value is too large.

Reducing the value will increase refinement near entities, and will also reduce non-manifold vertices in trailing edges.

Have you run the Build Topology option first? This is needed for octree meshes.

Yes I did run build topology with 0.001 mm.

Thank You. This helped. Now I dont get a zig zag shaped blade but the problem that volume mesh is going inside the blade still exists.

Have you made ORFN material points inside the blade to help the Octree mesh method cut away the element correctly? You should have made material points in the fluid region to tell the Octree mesh method where the elements are to be.