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论文类型：期刊论文

发表时间：2012-12-01

发表刊物：INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING

收录刊物：Scopus、SCIE、EI

卷号：22

期号：4

页面范围：276-281

ISSN号：1053-5381

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

摘要：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.