Block Mesh with different number of nodes
 

Hi to everyone!
I'm new in OpenFoam, and I'm interested in coupling two different turbulence solvers in a block mesh.
For istance, I want to do a RANS in a zone and a LES in a small zone inside the previous one. I need a strong cell refinement in the LES zone.
Is OpenFoam capable to treat such a problem?
Thank you!
Ivan