Volume meshing includes high quality viscous layers insertion with inflation or extrusion method, ensuring the best possible transition for the turbulence. A combination is also possible, the user can choose the best option for each surface in the geometry.
The inflation method is compatible with full hexahedral and hex dominant meshes. In this method, the first boundary layer from the Euler mesh is inflated (pushing away the other cells) and the viscous layers are then inserted. It creates an excellent transition between the last layer and the Euler mesh.
The extrusion method is compatible with hex dominant meshes. In this method, the boundary layer is inserted based on the requested height, removing the cells underneath from the Euler mesh. Viscous layers are then inserted and a reconnection is done with the far field mesh. The advantages are here double: a perfect far field and more constant boundary layer thickness.