[Larrabee]

Hi, everyone. I am now working on a problem about a pitching 2D airfoil. I have written my UDF and it makes the airfoil oscillate. However, the airfoil is now oscillating around Z axis and I want to set the axis to be 1/4 of the chord length. What should I do to the UDF?


#include "udf.h"
#define Freq 2.0
#define w 2.0*M_PI*Freq
#define pitch 7.5*M_PI/180

DEFINE_CG_MOTION(shm, dt, cg_vel, omega, time, dtime)
{
real omega;

omega = pitch*w*cos(w*time);

cg_vel[0] = 0.0;
cg_vel[1] = 0.0;
cg_vel[2] = 0.0;

cg_omega[0] = 0.0;
cg_omega[1] = 0.0;
cg_omega[2] = omega;
}