I am doing a flow analysis on a ventilated brake disc and I need to evaluate the mass flow rate that is coming out from the radial vane. I tried to find information online and I found a way which says to create a surface above the disc vane (2mm above) and evaluate the mass flow from that surface.
My first trial to create the surface that I need was to design three planes (as in the figure above) and trying to obtain a surface which is the intersection between the three planes, but I cannot obtain anything similar.
The surface that I need, should be as the green square between the two grey vertical planes.
Can you please explain to me how to do it?