# Turbulent flow around a square cylinder

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August 1, 2017, 06:44
Turbulent flow around a square cylinder
#1
Member

Paul Zhang
Join Date: Feb 2011
Posts: 44
Rep Power: 14
Hello,

I am running the square cylinder testing case using the mesh given in the built-in folder of SU2 and try to reproduce the solution of the square cylinder case in the AIAA paper "Stanford University Unstructured (SU2): Open-source Analysis and Design Technology for Turbulent Flows". In order to do that, the free-stream conditions are modified to be as following:

MACH_NUMBER= 0.2
FREESTREAM_TEMPERATURE= 273.15

However, I got a St number value quite different from the one given in the paper.

St=fL/U=0.083839346
where f = 1/T
T = 120 * 0.0015 = 0.18
U = 66.2643
L = 1

Quite confused. Any help is appreciated.

Thanks,
Paul

Attached are the figures where I found that a period has 120 time steps.
Attached Images
 Period1.png (40.7 KB, 22 views) Period.png (27.8 KB, 20 views)

 August 11, 2017, 09:07 #2 Super Moderator   Francisco Palacios Join Date: Jan 2013 Location: Long Beach, CA Posts: 404 Rep Power: 14 Hi, My recommendation is to take a look at this paper: https://arc.aiaa.org/doi/abs/10.2514/6.2014-2404 were you can maybe find some extra information. Another thing that you can do is to compare your results with the figure 7 in the article that you cite in case something has changed in the latest releases of SU2. Best, Francisco

August 13, 2017, 23:55
#3
Member

Paul Zhang
Join Date: Feb 2011
Posts: 44
Rep Power: 14
Quote:
 Originally Posted by fpalacios Hi, My recommendation is to take a look at this paper: https://arc.aiaa.org/doi/abs/10.2514/6.2014-2404 were you can maybe find some extra information. Another thing that you can do is to compare your results with the figure 7 in the article that you cite in case something has changed in the latest releases of SU2. Best, Francisco
Dear Prof. Palacios,

Your reply is just in time. I realized that the SU2 code has been updated which yields a better solution.

Thank you so much for your guidance.

Best,
Paul