How to obtain the force by integrating the pressure？
 

Hey CFDers,
I make a plane section cross the target I study and get a outline on the target. I want to get the force acting on the outline. However I failed to obtain the force by integrating the pressure.
Anyone can provide me some suggestions?

I don't think what you're doing makes any physical sense. You have to multiply by an area which is infinitely small with that method.

You're better off calculating the force as a field and taking a slice of it instead, I think.