Large-eddy simulation of flow about a rotating cylinder at large Reynolds number

Pullin, D.; Cheng, W.; Samtaney, Ravi

Large-eddy simulation of flow about a rotating cylinder at large Reynolds number

Type

Conference Paper

Authors

Pullin, D.
Cheng, W.
Samtaney, Ravi

KAUST Department

Fluid and Plasma Simulation Group (FPS)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division

Date

2018

Abstract

Wall-resolved large-eddy simulations (LES) of flow over a rotating cylinder are described. The two important flow parameters are the Reynolds number ReD = U∞ D/ν and the rotation speed α = Ω D/(2 U∞). We discuss LES data sets obtained by varying α at various ReD with our main results at ReD = 6 × 104. Our emphasis centers on the lift-crisis phenomenon where, at fixed and large ReD, the lift coefficient CL decreases suddenly as α passes though a narrow, critical band. We show the variation of time/span-wise averaged pressure and skin-friction coefficients around the cylinder surface as α is increased. The LES is shown to capture the lift crisis at ReD = 6 × 104. Calculations of CL are compared with experimental measurements.

Citation

Pullin, D. I., Cheng, W., & Samtaney, R. (2018). Large-eddy simulation of flow about a rotating cylinder at large Reynolds number. Proceeding of THMT-18. Turbulence Heat and Mass Transfer 9 Proceedings of the Ninth International Symposium On Turbulence Heat and Mass Transfer. https://doi.org/10.1615/thmt-18.1110