Question about shifting turbulence model from K-Omega to SSG Reynolds stress

Anna Tian · November 3, 2012, 15:03

Hi

I'm shifting the turbulence modeling of my simulation from K-Omega to SSG Reynolds stress. The grid independence study result works well for my K-Omega simulation.

May I ask do I need to do the grid independence study again? (Only because I change my turbulence model)

Thank you very much.

Anna Tian · January 20, 2013, 12:30

Quote:

Originally Posted by Anna Tian

Hi

I'm shifting the turbulence modeling of my simulation from K-Omega to SSG Reynolds stress. The grid independence study result works well for my K-Omega simulation.

May I ask do I need to do the grid independence study again? (Only because I change my turbulence model)

Thank you very much.

Could someone answer me this question? Thanks!

cdegroot · January 20, 2013, 13:36

I would check grid independence again. When you check grid independence you are trying to determine if the solution that you obtained for your governing equations is sufficiently resolved by the grid that you used. Since the turbulence equations that you are solving are different, it can't be guaranteed that the same grid will do as good of a job resolving the solution. That being said, it is fairly likely that the same grid is fine since the solution of the turbulence equations influence the flow solution indirectly. However, it is good practice to always check.

November 3, 2012, 15:03	Question about shifting turbulence model from K-Omega to SSG Reynolds stress	#1
Anna Tian Senior Member Meimei Wang Join Date: Jul 2012 Posts: 494 Rep Power: 16	Hi I'm shifting the turbulence modeling of my simulation from K-Omega to SSG Reynolds stress. The grid independence study result works well for my K-Omega simulation. May I ask do I need to do the grid independence study again? (Only because I change my turbulence model) Thank you very much. __________________ Best regards, Meimei

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January 20, 2013, 13:36		#3
cdegroot Senior Member Chris DeGroot Join Date: Nov 2011 Location: Canada Posts: 414 Rep Power: 18	I would check grid independence again. When you check grid independence you are trying to determine if the solution that you obtained for your governing equations is sufficiently resolved by the grid that you used. Since the turbulence equations that you are solving are different, it can't be guaranteed that the same grid will do as good of a job resolving the solution. That being said, it is fairly likely that the same grid is fine since the solution of the turbulence equations influence the flow solution indirectly. However, it is good practice to always check.