Strouhal Number of a square cylinder not matching

saugatshr4 · April 10, 2020, 01:46

I trying to do a 2D model of the square cylinder for a Reynolds number of 50000. I am using the K-omega SST model. I have satisfactory results with the drag and lift. However, I am having some discrepancies in Strohaul's Number. I am getting a number of 0.08, whereas the expected number is in the range of 0.12.
Hope you can help.
Thanks in advance.

vinerm · April 10, 2020, 04:38

Drag and lift are not much affected by the resolution but frequency is. A higher frequency requires finer resolution. You need to check if you are using fine enough temporal as well as spatial resolution to resolve the frequency for St of 0.12.

April 10, 2020, 01:46	Strouhal Number of a square cylinder not matching	#1
saugatshr4 New Member Saugat Shrestha Join Date: Dec 2019 Location: Thailand Posts: 27 Rep Power: 7	I trying to do a 2D model of the square cylinder for a Reynolds number of 50000. I am using the K-omega SST model. I have satisfactory results with the drag and lift. However, I am having some discrepancies in Strohaul's Number. I am getting a number of 0.08, whereas the expected number is in the range of 0.12. Hope you can help. Thanks in advance.

April 10, 2020, 04:38	Frequency	#2
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 37	Drag and lift are not much affected by the resolution but frequency is. A higher frequency requires finer resolution. You need to check if you are using fine enough temporal as well as spatial resolution to resolve the frequency for St of 0.12. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

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