On the reliability of eddy viscosity based turbulence models in predicting turbulent flow past a circular cylinder using URANS approach

Rajani, BN and Kandasamy, A and Majumdar, Sekhar (2012) On the reliability of eddy viscosity based turbulence models in predicting turbulent flow past a circular cylinder using URANS approach. Journal of Applied Fluid Mechanics, 5 (11). pp. 67-79. ISSN 17353572

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    Abstract

    Turbulent flow past circular cylinder at moderate to high Reynolds number has been analysed employing an second-order time accurate pressure-based finite volume method solving two-dimensional Unsteady Reynolds Averaged Navier Stokes (URANS) equations for incompressible flow, coupled to eddy-viscosity based turbulence models. The major focus of the paper is to test the capabilities and limitations of the present turbulence model-based 2D URANS procedure to predict the phenomenon of Drag Crisis, usually manifested in reliable measurement data, as a sharp drop in the mean drag coefficient around a critical Reynolds number. The computation results are compared to corresponding measurement data for instantaneous aerodynamic coefficients and mean surface pressure and skin friction coefficients. Turbulence model-based URANS computations are in general found to be inadequate for correct prediction of the mean drag coefficients, the Strouhal number and also the coefficients of maximum fluctuating lift over the range of flow Reynolds number varying from 104 to 107.

    Item Type: Journal Article
    Additional Information: Copyright to this article belongs to Regional Information Center for Science and Technology
    Uncontrolled Keywords: Turbulent flow;Circular cylinder;Drag crisis;Unsteady RANS procedure;Eddy viscosity based turbulence models;Implicit finite volume method
    Subjects: AERONAUTICS > Aeronautics (General)
    ENGINEERING > Fluid Mechanics and Thermodynamics
    Division/Department: Computational and Theoretical Fluid Dynamics Division, Other, Other
    Depositing User: Ms. Alphones Mary
    Date Deposited: 30 Jan 2012 11:11
    Last Modified: 30 Jan 2012 11:11
    URI: http://nal-ir.nal.res.in/id/eprint/10305

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