1 Reply Latest reply on Oct 1, 2014 6:50 PM by Jared Conway

# Looking to find the torque caused by air flowing against a plate, GG torque help, flow simulation

FYI new to CFD and no one in my firm knows much about it......

I am working on a model of a gimbal and looking at the air flow against the front cover of 250 ft/s.

I want to know the torque required to hold the ball part of the gimbal in place. I did this and got some interesting answers that I didn't understand, using GG torque as a goal.

So I went to an easier problem. Looking at the torque created by air flowing against flat plate 9'' x 10'' with at base larger then the computational domain. I again used GG torque as a goal and included pressure on front and back surfaces of the plate. The average torque I got was 2.1 ft*lb with an average pressure of 14.8 psi.

Doing the calcs on this, the pressure and the torque created do not match up, not even close.

(10'' x 9'') x (14.8 psi) x (4.5''/12) = 499.5 ft*lb

Thinking that I don't fully understand the output of GG torque, help on this? And any help on how to find the torque to hold the plate still with 250 ft/s air flowing against it?