I'm really new to ansys fluent mesh, I'm used to mechanical where if I want to make the mesh finer in an area of a body, I divide the body with the shared topology and refine that area. But in the fluent mesh how do I refine that area? Finally how can I get a clean mesh for good results? I didn't try a 2D mesh directly, I took a 2D face that I extruded (the goal is to work on a 3D model more complex than that)