merged mesh
 

Hi All
I meshed two parts of my model separately in two different files using ICEM CFD with unstractured mesh and prism layer. When I want to merged these two parts in another file using merge volume mesh even with similar mesh size at interface I 've got multiple edges,Non-manifold vertices error at interface. Any idea?

Thanks

Prisms are the problem...
 

You can't merge mesh once it has prisms... Tetra mesh is easy to manipulate for a merge, but prism makes things much more difficult... Once you merge, you can always run prism afterward...

For more on this merge function, I have described it in detail on several other CFD-Online discussions...

If you would rather just move forward from here, I suggest a non-conformal interface... Depending on your solver, this is done differently. CFX and Fluent both support non-conformal interfaces very well.

Simon

Thanks Simon, I was wondering if I want to use a Part by Part mesh what should I do with interface? Another question is that the option existing mesh is really using the existing mesh pattern or it changes when we add the new part to geometry?

Thanks again

Behind the scenes...
 

The interface just goes out at a named boundary and then you would set up the non-conformal interface in your solver...

Behind the scenes, the option to use existing mesh really just meshes the model as normal (Octree is still a top down method), but then replaces the octree surface mesh in the specified part(s) with the original mesh and then runs "Make Conformal" to make the volume mesh conformal with the surface mesh...

Simon