Something different between Fluent 12.1.4 and 6.3?
 

Hi all, I need your helps.

I'm simulating the model for tank sloshing induced by rolling motion.

What I'm wondering is that ;

Using the same UDF code to Fluent 12.1.4 but the tank motion didnt work well. Problem is that the tank rolled to left hand side but when the tank is on zero position, it pepeats again to left hand side. I used angular velocity in CG motion shown in below UDF.
First time I thought the code was wrong. But when I tried it in Fluent Ver. 6.3, it worked well.
I really confused what's wrong in my simualting.
very pleasure to hear any advice. thank you.

---------------------------------------------------------------
DEFINE_CG_MOTION(rigid, dt, cg_vel, cg_omega, time, dtime)
{
NV_S (cg_vel, = , 0.0);
NV_S (cg_omega, = ,0.0);

cg_omega[2]=0.4*cos(1.570796327*time);
}
---------------------------------------------------------------

can i know setting for the fluent, began define untill iterate model? please send to asharkhoirula@yahoo.com thanks