Turbulent channel with a bump - SU2 Cp problem

pedropcb13 · July 19, 2021, 05:08

Hi everyone,

I am simulating the turbulent channel with a bump using SU2. The same one in this repository: https://github.com/su2code/VandV/blo...rb_bump_sa.cfg

I am using the grids from the NASA website: https://turbmodels.larc.nasa.gov/bump_grids.html

The original .cgf file in the mentioned repository is for Mach 0.20. When changing the Mach to 0.21, I update the BC using the isentropic flow equations. (Pt/Po = 1.031211844 & Ttot/To = 1.00882, for Mach = 0.21)

So that the updated BC for Mach 0.21 in the .cfg file are:

% Velocity inlet marker
MARKER_INLET= ( inlet, 302.646, 70816.204742, 1.0, 0.0, 0.0 )
%
% Pressure outlet marker
MARKER_OUTLET= ( outlet, 68672.8 )
--------------------------------------------------------------------

The simulation converges, however, the Cp values does not make sense when I do that. What else should I change in the .cfg file to simulate Mach 0.21?

pedropcb13 · July 19, 2021, 06:28

Problem solved!

Unfortunately there is no way to delete the post.

TKatt · July 23, 2021, 05:41

Hi, glad you solved your problem

If you don't mind, maybe you can post your solution here briefly, it might help others to understand their problems

best, Tobi

July 19, 2021, 05:08	Turbulent channel with a bump - SU2 Cp problem	#1
pedropcb13 New Member Pedro Paulo Join Date: Jul 2021 Posts: 9 Rep Power: 5	Hi everyone, I am simulating the turbulent channel with a bump using SU2. The same one in this repository: https://github.com/su2code/VandV/blo...rb_bump_sa.cfg I am using the grids from the NASA website: https://turbmodels.larc.nasa.gov/bump_grids.html The original .cgf file in the mentioned repository is for Mach 0.20. When changing the Mach to 0.21, I update the BC using the isentropic flow equations. (Pt/Po = 1.031211844 & Ttot/To = 1.00882, for Mach = 0.21) So that the updated BC for Mach 0.21 in the .cfg file are: % Velocity inlet marker MARKER_INLET= ( inlet, 302.646, 70816.204742, 1.0, 0.0, 0.0 ) % % Pressure outlet marker MARKER_OUTLET= ( outlet, 68672.8 ) -------------------------------------------------------------------- The simulation converges, however, the Cp values does not make sense when I do that. What else should I change in the .cfg file to simulate Mach 0.21?

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July 19, 2021, 06:28		#2
pedropcb13 New Member Pedro Paulo Join Date: Jul 2021 Posts: 9 Rep Power: 5	Problem solved! Unfortunately there is no way to delete the post.

July 23, 2021, 05:41		#3
TKatt Member na Join Date: Jul 2018 Posts: 90 Rep Power: 8	Hi, glad you solved your problem If you don't mind, maybe you can post your solution here briefly, it might help others to understand their problems best, Tobi