Forces on a clyinder in a steady fluid flow

[johnt447]

For my project been given the task of finding the fluid flow round a cylinder. My task for the weekend is to find the forces in work here. All of our work is numerical so no analytical solutions will really help although they might help push me in the right direction. As such we have the velocity and pressure of the system but I'm a bit stuck on how to find the forces. I was thinking of finding the force vector at the top of the cylinder where the pressure is lower to show the suction force in action there. It's a steady inviscid and non compressible flow.
(no idea how to use the equations on this site sorry)
From one of my books i saw that f_x = integral of 2pi to 0 (pressure cos (theta) * radius d theta)

now that works for analytical so my plan is to slightly change that to;

f_x= pressure * cos (theta)* radius. Where I will go through all the values of pressure and the corresponding theta to find the values of f_x and also change the equation slightly for f_y.

Any idea if this will work?

 

[BigJDubs]

Yes, this should work! You may want to consider using a numerical integration method to find the forces more accurately if you have access to a numerical integration library. This would involve taking the sum of all the pressure cos (theta) * radius values over a range of theta values, and then dividing by the total number of values that were summed.