DOI: 10.1615/THMT-18
ISBN Print: 978-1-56700-468-7
ISBN Online: 978-1-56700-467-0
ISSN Print: 2377-2816
Large-eddy simulation of flow about a rotating cylinder at large Reynolds number
摘要
Wall-resolved large-eddy simulations (LES) of flow over a rotating cylinder are described. The two important flow parameters are the Reynolds number ReD = U8734; D/ν and the rotation speed α = ΩD/(2U∞). 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 skinfriction 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.