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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Dynamic mesh-nan in cg definition › Reply To: Dynamic mesh-nan in cg definition

November 24, 2023 at 3:59 pm
Thodorisdm
Subscriber
I always check the mesh prior to the preview of the mesh motion. Hereby my UDF. Always works for frequency 1-5 but not for larger.
 
#include "udf.h"
 
#define amplitude 0.01
#define frequency 10
 
DEFINE_CG_MOTION(ymotion,dt,vel,omega,time,dtime)
{
real vmax;
real Tper; 
 
Tper = 1/frequency;
vmax = (amplitude * 2*M_PI) / Tper;
vel[1] = vmax*(cos(2 * M_PI * time / Tper));
}