how to do about dynamic mesh?
 

the udf file contains as:
#include "udf.h"
DEFINE_CG_MOTION(RotationVel , dt , vel , omega , time , dtime)
{
vel[0] = 0.001;
}
why the field not change? help me guys,thank you in advance
external：120×120(mm);internal:30×30(mm)