Convergence accelaration

aero_amit · May 30, 2013, 14:12

Hi SU2 developers,

I have started exploring SU2.

Onera-M6 wing simulation (RANS), took around 15000 iterations for convergence.

I urge developers to give a try to (LU-SGS+GMRES) matrix free implicit method (which is supposed to give much faster convergence).

Also some of the commercial software uses good initialization. For example Fluent uses so called FMG (Full Multigrid) initialization to obtain good initial solution (Euler). With this initial solution, one can quickly arrive at converged results.

My experiences with some of the commercial software -->> converged results for forces and moments are obtained within 300 to 1000 iterations for most of the cases.

I am sure SU2 will come to this level very soon

Thanks and Regards
Amit (Harry)

aniketaranake · June 13, 2013, 18:02

Hi Amit,

Thank you for your suggestions! We are continually working on improving the code's capabilities, and initialization and inversion methods are certainly items we hope to improve in coming releases.

Kind regards,
Aniket

May 30, 2013, 14:12	Convergence accelaration	#1
aero_amit Member Amit Join Date: May 2013 Posts: 85 Rep Power: 13	Hi SU2 developers, I have started exploring SU2. Onera-M6 wing simulation (RANS), took around 15000 iterations for convergence. I urge developers to give a try to (LU-SGS+GMRES) matrix free implicit method (which is supposed to give much faster convergence). Also some of the commercial software uses good initialization. For example Fluent uses so called FMG (Full Multigrid) initialization to obtain good initial solution (Euler). With this initial solution, one can quickly arrive at converged results. My experiences with some of the commercial software -->> converged results for forces and moments are obtained within 300 to 1000 iterations for most of the cases. I am sure SU2 will come to this level very soon Thanks and Regards Amit (Harry)

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June 13, 2013, 18:02		#2
aniketaranake New Member Join Date: Dec 2011 Posts: 22 Rep Power: 15	Hi Amit, Thank you for your suggestions! We are continually working on improving the code's capabilities, and initialization and inversion methods are certainly items we hope to improve in coming releases. Kind regards, Aniket