facing problem in dynamic meshing motion preview
 

hi

i m doing simulation on Inertance tube Pulse tube refrigerator. For this i have used dynamic meshing option for Piston n compressor walls. To do this i linked the UDF to piston n defined it as rigid body n compressor wall as deforming body. After linking whn i see the zone motion preview the piston motion is in oppsite direction ..instead to cming inside it goes outside . Pls help me.

Do you have a video or a image of motion?