Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-12-01

Journal: INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING

Included Journals: EI、SCIE、Scopus

Volume: 22

Issue: 4

Page Number: 276-281

ISSN: 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.