Reply To: Pitching airfoil using overset and dynamic mesh.

[nahian.masud]

Hi,

Thanks for responding. I tried hooking the same sine function in a TRANSIENT_profile in the cell zone. If i do that, the airfoil moves as per my prediction. But the cl value is super high (40000 to -40000). I cannot figure out what is the problem. I am attaching that udf as well. 

#include "udf.h"

#define PI 3.14159

 

DEFINE_TRANSIENT_PROFILE(speed, time)

{

real ampl = 0.2618;

/*real freq = 2.*PI;*/

real omega;

 

omega = 0.2618 * 18.66 * cos(2.0 * 180 * 2.97 * time);

 

return omega;

 

}

any idea on how to get rid of this?

thanks