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Indexed by:期刊论文

Date of Publication:2012-12-01

Journal:INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING

Included Journals:Scopus、SCIE、EI

Volume:22

Issue:4

Page Number:276-281

ISSN No.:1053-5381

Key Words:Circular cylinder; flow visualization; finite volume method; Cartesian cut cell; k-omega turbulence model

Abstract:The starting and steady flows past a circular cylinder placed near a planar boundary are investigated both experimentally and numerically. The flow is accelerated until it reaches an ultimate speed and then remains steady. The flow field is visualized using a hydrogen bubble technique. In numerical simulations, the Navier-Stokes equations for unsteady incompressible viscous flow combined with a k - omega turbulence model are solved via a finite volume method with SIMPLEC algorithm. The investigation reveals that vortex shedding takes place at the starting flow stage but is suppressed when the gap ratio G/D becomes smaller than 0.3.