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流动显示和图像处理期刊
SJR: 0.11 SNIP: 0.312 CiteScore™: 0.1

ISSN 打印: 1065-3090
ISSN 在线: 1940-4336

流动显示和图像处理期刊

DOI: 10.1615/JFlowVisImageProc.v12.i2.10
pages 105-110

NUMERICAL VISUALIZATION OF UNSTEADY VORTEX SHEDDING

Giancarlo Alfonsi
Fluid Dynamics Laboratory, Universita della Calabria, Via P. Bucci 42b, 87036 Rende (Cosenza), Italy

ABSTRACT

The flow generated by a viscous incompressible fluid past an impulsively started circular cylinder at the Reynolds number 1000 (based on free-stream velocity and the cylinder diameter) is visually described for several time steps of integration by means of computer generated images of the vorticity field. The flow-field representations are based on the results of a computational code in which a mixed spectral-finite analytic technique is used for the numerical integration of the two-dimensional time-dependent Navier-Stokes equations. The mutual interaction of the primary vortices in the near wake of the cylindrical body, as a fundamental mechanism of the vortex shedding phenomenon, is demonstrated.


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