Discussion Groups

Simulation CFD

Reply
Member
Riad1960
Posts: 3
Registered: ‎01-23-2013

Strange velocities

96 Views, 1 Replies
03-28-2013 04:06 AM

Hi,

I am modeling a simple transient cooling process of a hot solid object (natural convection) using chimney approach. I still get high velocities and divergence even after smoothing the mesh and using different time step size or inner iterations.

 

Does anyone faced the same problem, or have some hints?

 

Thanks,

Please use plain text.
*Expert Elite*
OmkarJ
Posts: 435
Registered: ‎10-02-2012

Re: Strange velocities

04-02-2013 05:05 AM in reply to: Riad1960

I think the problem is simply the timestep? You need to do the sensetivity study of timestep independence, by gradually reducing the timestep such that you see the convergence at every timestep.

 

OJ

Please use plain text.