Nested blocks bug?
 

Hello. I'm doing ship simulation with 3 nested blocks. Two inside blocks are with grid overlay BC, outside block are with symmetry BC and Specified velocity BC ant at the front and back. With laminar model i get different flow speeds at free surface in the inside block (see attached pictures). With turbulence model (RNG) i get diferent speed at the fluid surface in the biggest block (see attached pictures). i'm fearing that it can distort resistance results. Any ideas how to fix it?