On the new vortex shedding mode past a rotating circular cylinder
- 3 April 2003
- journal article
- research article
- Published by AIP Publishing in Physics of Fluids
- Vol. 15 (5), 1257-1260
- https://doi.org/10.1063/1.1562940
Abstract
To examine in detail the behavior of a new vortex shedding mode found in a previous investigation [Phys. Fluids 14, 3160 (2002)], a two-dimensional numerical study on the laminar incompressible flow past a rotating circular cylinder in the Reynolds number range and at rotational rates was carried out. The results obtained clearly confirm the existence of the second shedding mode for the entire Reynolds number range investigated. A complete bifurcation diagram was compiled defining both kind of shedding modes. The unsteady periodic flow in the second mode is characterized by a frequency much lower than that known for classical von Kármán vortex shedding of the first mode. The corresponding Strouhal number shows a strong dependence on the rotational velocity of the cylinder, while only a weak dependence is observed for the Reynolds number. Furthermore, the amplitudes of the fluctuating lift and drag coefficients are much larger than those characterizing classical vortex shedding behind nonrotating or slowly rotating cylinders. Additionally, negative values for the mean drag denoting thrust are found within the second shedding mode.
Keywords
This publication has 7 references indexed in Scilit:
- Effect of high rotation rates on the laminar flow around a circular cylinderPhysics of Fluids, 2002
- A challenging test case for large eddy simulation: high Reynolds number circular cylinder flowInternational Journal of Heat and Fluid Flow, 2000
- Laminar flow past a rotating circular cylinderPhysics of Fluids, 1999
- Large eddy simulation of the subcritical flow past a circular cylinder: numerical and modeling aspectsInternational Journal for Numerical Methods in Fluids, 1998
- Steady and unsteady flow past a rotating circular cylinder at low Reynolds numbersComputers & Fluids, 1989
- Iterative Solution of Implicit Approximations of Multidimensional Partial Differential EquationsSIAM Journal on Numerical Analysis, 1968
- The flow past a rapidly rotating circular cylinder in a uniform streamJournal of Fluid Mechanics, 1957