Question about BFC
 

Dear all I want to know how phoenics calculate the surface area in the bfc coordinate.In my simulation,I find that the surface area which phoenics calculate is much large than its real area. And I don't know why?(If I give vol flow rate as the inlet boundary condition,I find the velocity at the inlet is much slower than I think.So I think the inlet area is calculated larger)Could any one help me?

Thank you very much.

mahe