Force acting on a flat plate that is moving trough fluid

[deluksic]

soo as the title says, i need formula for force acting on a plate that is moving trough fluid, in my case air... need it for rocket simulation because of its flat stabilizers...

i thought like this:

a flat plate is moving in any direction (yeah that complicates things... but keep it simple) so i get the normal component of speed on the plate, then i calc somthing like this:

F = q*v*P where q is density of fluid, v is velocity, and P is size of plate (m2)

**plate has no width... in my case**

thats kinduh dum formula but i need real one :D

 

[edgepflow]

Try

F = 0.5 X Cd X q X v^2 X P

where variables are as you selected above and Cd is the drag coefficient.