Basic moving object help!
 

I am trying to obtain the lift and drag of a hydrofoil.
I have a mesh which works for steady cases, now I am trying to run a transient case with the airfoil moving.

I am trying to use a UDF to achieve this but keep getting this error
"warning: incorrect cg motion UDF flutter on zone 7 (assuming no motion)"

My UDF is as follows, I am very new to C programming so may have made some basic mistakes.

In your UDF, the moving direction of the object was not defined. VEL[0], VEL[1], VEL[2] stand for the x,y,z-component of velocity, respecitvely. In addition, 'CURRENT_TIME' which means 'real current flow time (in seconds)' is suggested to replace 'Time' in your UDF expression. More detailed informations about DEFINE_CG_MOTION macro could be found in chapter2.6.1 in Fluent documentation.