<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Hi Ketan,</div><div><br data-mce-bogus="1"></div><div>Sorry for late replay. Infact, I have found the mistake. It was from my side. I called call object two times in usr check routine to calculate drag coefficient. so the results got double and tripled each time. anyway thanks for the replay. Now I am working on Forced motion of cylinder by changing some parameters in ocyl example.</div><div><br data-mce-bogus="1"></div><div>Thanks with regards</div><div><br data-mce-bogus="1"></div><div>Sijo George</div></div></body></html>