Ansys Meshing – Sizing

Sizing is where most of the mesh quality is decided. Before any method or inflation setting, the size of the elements determines whether you resolve the gradients or just average them away.

Three settings do most of the work. The element size sets the baseline for the body. Curvature refinement adds cells where the surface bends, driven by the angle you allow across a single element. Proximity refinement adds cells where two surfaces come close, controlled by how many elements you demand across the gap.

Refining everywhere is the expensive mistake. Raise the resolution where the flow changes, near walls, in wakes, around small features, and let the far field stay coarse. A smooth growth between the two is worth more than a low absolute element size.