Journal
PHYSICS OF FLUIDS
Volume 33, Issue 11, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0071079
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Funding
- National Research Foundation through the Ministry of Science and ICT [2017M2A8A4018482, 2021R1A4A1032023]
- National Supercomputing Center [KSC-2019-CRE-0022]
- National Research Foundation of Korea [2021R1A4A1032023] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study proposes a predictive model for the drag coefficient of a circular cylinder based on the mean streamwise velocity and Reynolds normal stresses in the wake, which shows good agreement with numerical simulations across various Reynolds numbers.
We suggest a predictive model of the drag coefficient of a circular cylinder using the information of the mean streamwise velocity and Reynolds normal stresses at a streamwise location in the wake. The boundary layer approximation in the wake and Bernoulli equation in the inviscid region are used to model the contribution from the pressure distribution at the streamwise measurement location. To examine the accuracy of the present model, unsteady three-dimensional numerical simulations are conducted at various Reynolds numbers from laminar to critical regimes. The drag coefficients predicted from the present model agree very well with those from the present numerical simulation.
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