Local remeshing
 

Hello everyone. I have a 3D model similar to that one in the picture. After the first meshing procces, the mesh presents some bad elements in the indicated zone. Applying a refinement on this zone, these bad elements are corrected, but other zones on the mesh are also modified and bad elements appear.

I would like to know if there is any option to remesh just this zone of the mesh not modifying the other nodes of the mesh.

In the step 2 I have represented 2 option that would be valid.
A: Define a sphere volume so any node out of it is not modified
B: Define a plane so any node at the right zone is not modified
Thank you all.

https://cdn1.imggmi.com/uploads/2018...a8f26-full.jpg