Torque in CFD-Post
 

Hi,
I have went through many threads regarding this, so i hope i am not repeating.
I calculated torque about an co-ordinate system using 'torque_z_C1()@airfoil3'. The value that i obtained is 1000 order less than what i am getting experimentally. I want to calculate pitching moment of airfoil.

1. Am i am supposed to multiply something to torque value?
2. Will that torque expression mentioned give pitching moment of unit(N-m).
Please suggest anything.

What units are being shown in the software ?

What units are you expecting ?

It is showing [J] which is N-m which i am expecting.
But magnitude of torque i am getting is quite low. I checked my pressure values but they are good. I don't know why this is happening.

Have a look at the axis at which torque is calculated. In CFD Post go into calculators and calculate the torque value about the correct axis.

What about the area of your airfoil? Is it the same as in your experiment?

I think you are right. I don't know how i missed this aspect. There is significant difference in both areas. Thank you for your suggestion.

One thing i am thinking is to normalize torque values with their areas. Is it correct to do this and then compare the values?

Of course if areas are different then forces are also different and to compare results you should multiply them by areas ratio.