Direct numerical simulation of three-dimensional flow past a yawed circular cylinder of infinite length

Ming Zhao, Liang Cheng, Tongming Zhou

    Research output: Contribution to journalArticlepeer-review

    172 Citations (Scopus)

    Abstract

    Direct numerical simulation of flow past a stationary circular cylinder at yaw angles(α) in the range of 0–60° was conducted at Reynolds number of 1000. The three-dimensional(3-D) Navier–Stokes equations were solved using the Petrov–Galerkin finite element method. The transition of the flow from 2-D to 3-D was studied. The phenomena that were observed in flow visualization, such as the stream wise vortices, the vortex dislocation and the instability of the shear layer, were reproduced numerically. The effects of the yaw angle on wake structures, vortex shedding frequency and hydrodynamic forces of the cylinder were investigated. It was found that the Strouhal number at different yaw angles (a) follows the independence principle. The mean drag coefficient agrees well with the independence principle. It slightly increases with the increase of α and reaches a maximum value at α=60°, which is about 10% larger than that when α=0°. The root-mean-square(r.m.s.)values of the lift coefficient are noticeably dependent on α.
    Original languageEnglish
    Pages (from-to)831-847
    Number of pages17
    JournalJournal of Fluids and Structures
    Volume25
    Issue number5
    DOIs
    Publication statusPublished - 2009

    Keywords

    • structural analysis
    • structural dynamics

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