Convergence issue with Euler_Explicit time stepping.!!!

Vino · December 15, 2014, 07:42

Hi,
I just tried inviscid flow over cylinder(Incompressible) with EULER_EXPLICIT time stepping and 2ND_ORDER_LIMITER. It is not converging and leading to unphysical results. But with EULER_IMPLICIT the results are fine. I would like to know whether its a bug in the solver itself. Please follow the following links for the config and grid files which I used.

Config_file

Grid_file

fpalacios · January 1, 2015, 20:24

Have you tried to reduce the CFL number with the explicit formulation?

Best Regards,

Francisco Palacios
SU2 lead developer

Vino · January 27, 2015, 15:27

Thanks for you reply.

Yes.! I have tried Explicit Euler-stepping and RK-stepping with CFL number as low as 0.5. Still the problem exists.

December 15, 2014, 07:42	Convergence issue with Euler_Explicit time stepping.!!!	#1
Vino Senior Member Vino Join Date: Mar 2013 Posts: 130 Rep Power: 14	Hi, I just tried inviscid flow over cylinder(Incompressible) with EULER_EXPLICIT time stepping and 2ND_ORDER_LIMITER. It is not converging and leading to unphysical results. But with EULER_IMPLICIT the results are fine. I would like to know whether its a bug in the solver itself. Please follow the following links for the config and grid files which I used. Config_file Grid_file

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January 1, 2015, 20:24		#2
fpalacios Super Moderator Francisco Palacios Join Date: Jan 2013 Location: Long Beach, CA Posts: 404 Rep Power: 16	Have you tried to reduce the CFL number with the explicit formulation? Best Regards, Francisco Palacios SU2 lead developer

January 27, 2015, 15:27		#3
Vino Senior Member Vino Join Date: Mar 2013 Posts: 130 Rep Power: 14	Thanks for you reply. Yes.! I have tried Explicit Euler-stepping and RK-stepping with CFL number as low as 0.5. Still the problem exists.