SSG Reynolds Stress Model

Loris88 · November 1, 2013, 06:22

Hi everyone!

I would like to know which are the principal characteristics of SSG Reynolds Stress Model.
I have solved a problem with SST model. Using SSG model, with the same problem, I don't succeed to find the convergence. The residual does not go down and I do not find which could be the cause of this.

My prolem is a air flow in a rectangular channel that collides with a cube.
I attached the figure of the mesh around the cube.

So, If someone suggest me some trick for the convergence with SSG model, I will be grateful for the help.

Thank you

ghorrocks · November 1, 2013, 16:33

The Reynolds Stress Models all suffer from difficult numerics which makes them hard to converge. You have to use small time steps, high quality mesh, double precision numerics and a good initial condition to get them to converge.

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November 1, 2013, 16:33		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	The Reynolds Stress Models all suffer from difficult numerics which makes them hard to converge. You have to use small time steps, high quality mesh, double precision numerics and a good initial condition to get them to converge.