hi all my problem is how to mesh a 3D cylindrical pipe with a hemispheric obstacl (half sphere) with hexaedral elements or other but not tetra-and Tgrid because when i use it i have a numerical diffusion (no convergence) with turbulent flow principal steps please thanks for all

try to map the surface first then initialise the volume mesh in gambit, your face mesh should be exactly mapable

sorry but i havn't understand very well, can you give me more explication plz because i have a lot of message of error i thinck that in the construction of the geometrie of the problem i have follow bad step