calculating n plotting moments coefficients

maperik · June 19, 2011, 21:48

dear all....
i want to ask something...how to obtain moments coefficient on the CFD-Post?
which function can i use?i've tried using the "torque" function but the results were not as i expected. i guess it should use the "torque" function, but the choice of the axis there is only X, Y and Z.there is no choiceof the Y-axis at 1/4 chord.
what's the solution? do i have to start again from ICEM to put the center of axis at 1/4 chord or wing?

thanks before

pavitran · June 20, 2011, 02:37

You can make a local coordinate frame in post at any location.
Get the x,y,z co-ordinates of the 1/4th location and create the new co-ordinate frame.
While calculating torque in function calculator, you can choose the new co-ordinate frame.

maperik · June 20, 2011, 10:59

Quote:

Originally Posted by pavitran

You can make a local coordinate frame in post at any location.
Get the x,y,z co-ordinates of the 1/4th location and create the new co-ordinate frame.
While calculating torque in function calculator, you can choose the new co-ordinate frame.

ooh....
i see...i will try your suggestion. thanks a lot

June 19, 2011, 21:48	calculating n plotting moments coefficients	#1
maperik New Member kurniawan Join Date: Jun 2011 Location: Indonesia Posts: 2 Rep Power: 0	dear all.... i want to ask something...how to obtain moments coefficient on the CFD-Post? which function can i use?i've tried using the "torque" function but the results were not as i expected. i guess it should use the "torque" function, but the choice of the axis there is only X, Y and Z.there is no choiceof the Y-axis at 1/4 chord. what's the solution? do i have to start again from ICEM to put the center of axis at 1/4 chord or wing? thanks before

June 20, 2011, 02:37	Hi	#2
pavitran Member Dynampally Pavitran Join Date: Mar 2010 Location: India Posts: 74 Rep Power: 16	You can make a local coordinate frame in post at any location. Get the x,y,z co-ordinates of the 1/4th location and create the new co-ordinate frame. While calculating torque in function calculator, you can choose the new co-ordinate frame. maperik likes this.

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