a problem about dynamic mesh

speedcat

Hi
I';m having trouble getting the UDF DEFINE_GEOM to work properly. I would like to use the UDF to make the bottom of a rectangular duct with air blowing deform into a different shape over time. I have compiled the UDF properly and have hooked it into fluent as outlined in the UDF user';s manual. However, when I view the mesh motion, the bottom does not deform.
I would really appreciate your help. My e-mail is sxy_hit@163.com
My project is shown as follow.  I will give you some file about my problem. Thank you!

                           
The bottom of the duct is from (-5,-2.5) to (-5,2.5). the new position is defined by a parabola through (-5,-2.5), (0,-1) and (-5,2.5). The parabola is  .
/*************************************************************
*
*   defining parabola through points (-5,-2.5),(0,-1),(5,-2.5)
*
*************************************************************/
#include "udf.h"
DEFINE_GEOM(parabola,domain,dt,position)
{
/*set y=-0.06x^2-1*/
position[1]=-0.06*position[0]*position[0]-1;
}

speedcat

DEFINE_GEOM

speedcat

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