[gh_100]

Hello everyone,I'm using fluent UDF to define angular velocity for dynamic grid simulation, and the angular velocity was set 5ras/s,but the result of fluent calculation is different from what I defined.
for example，the angular velocity was 5ras/s,the time to calculate one circle should be 2*pi/5=1.25s.But I calculated for a long time (such as 20s) and didn't reach a circle(2*pi).

the code is below:

DEFINE_CG_MOTION(side2,dt,vel,omega,time,dtime)
{
real flow_time = CURRENT_TIME;

if(flow_time >=0)
omega[2]=-5;

}


does anyone can help me?
Thank you in advance

[AlexanderZ]

what about

DEFINE_CG_MOTION(side2,dt,vel,omega,time,dtime)
{
omega[2]=-5;
}

how it works?

[gh_100]

Originally Posted by AlexanderZ

what about

DEFINE_CG_MOTION(side2,dt,vel,omega,time,dtime)
{
omega[2]=-5;
}

how it works?

hello AlexanderZ
the omega[2] represents rotation around the Z axis, with a size of 5 radians / s.

thank you .

[AlexanderZ]

check if it works or not