Calculating coefficient from factional step result
 

Hi,

I've got velocities and pressure results by solving the non-dimenionalized incompressible NS eqns using the fractional step approach. My case is flow past square cylinder.

Now I need to get the pressure, lift, drag coefficients to verify my results. Are velocities and pressure results sufficient to get these quantities?

May I know what are the formulas? None of the papers I read gives the formulas.

Else, it will be kind enough if someone can tell me which paper or textbook which I can refer to.

Thanks alot

Re: Calculating coefficient from factional step re
 

Cl= Fl / 0.5 *rho *U*U * reference area where Fl is the lift or drag force calculated from pressure on the body and surface shear stress.