Comparison of Solvers

m15t3r_r0b0t · August 16, 2020, 02:49

I am doing a comparison of various solvers in the transition regime with regard to the LSB separation, reattachment etc. - Fluent, OpenFOAM etc. using the Gamma-Re-Theta model. I created a mesh using Pointwise and plan to use it for all the solvers. I was wondering if I should use one mesh throughout all the solvers, or perform mesh independence for all solvers before moving ahead? Please help. Also, if someone could explain why I can do one and not the other, that would be amazing!

Thanks.

sbaffini · August 16, 2020, 05:41

That pretty much depends from what answers you want from your comparison.

Actually, you can do both.

m15t3r_r0b0t · August 16, 2020, 07:06

Quote:

Originally Posted by sbaffini

That pretty much depends from what answers you want from your comparison.

Actually, you can do both.

Thanks for replying. I want to compare the transition, separation and reattachment points, the length of the laminar separation bubble and Reynolds Stress contours. Finally, I want to draw a comparison on how much each software is under/over predicting the results as compared to wind tunnel data.

sbaffini · August 17, 2020, 08:09

I guess then that you want to do both. Pick up a common starting grid and a series of refinements stopping at the level where all the solvers are converged

August 16, 2020, 02:49	Comparison of Solvers	#1
m15t3r_r0b0t New Member Ruchir Ravishankar Join Date: Feb 2020 Posts: 2 Rep Power: 0	I am doing a comparison of various solvers in the transition regime with regard to the LSB separation, reattachment etc. - Fluent, OpenFOAM etc. using the Gamma-Re-Theta model. I created a mesh using Pointwise and plan to use it for all the solvers. I was wondering if I should use one mesh throughout all the solvers, or perform mesh independence for all solvers before moving ahead? Please help. Also, if someone could explain why I can do one and not the other, that would be amazing! Thanks.

August 17, 2020, 08:09		#4
sbaffini Senior Member Paolo Lampitella Join Date: Mar 2009 Location: Italy Posts: 2,195 Blog Entries: 29 Rep Power: 39	I guess then that you want to do both. Pick up a common starting grid and a series of refinements stopping at the level where all the solvers are converged aero_head likes this.

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August 16, 2020, 05:41		#2
sbaffini Senior Member Paolo Lampitella Join Date: Mar 2009 Location: Italy Posts: 2,195 Blog Entries: 29 Rep Power: 39	That pretty much depends from what answers you want from your comparison. Actually, you can do both.