GGI interface and meshing

Vincent

Hi everybody, I try to simulate the heat transfer in the roof of a road tunnel during a fire. Because of this, I use different imported domains with different kind of mesh. My problem is that on an interface between a cubic mesh and an irregular mesh, I have differences of velocity and temperature fields, specially where I have important gradient. I think the problem comes from the differences between the size of the elements of each part and I like to know how elements have to be at an interface to keep a good continuity of fields. Thanks.