The Reynolds stresses equation modelling in the prediction of flow past a rotating cylinder at high Reynolds number.

Hector Iacovides, Timothy Craft, Sitthichai Ruchayosyothin

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    Abstract

    This research presents the predictions of flow past a rotating cylinder at a sub-critical Reynolds number of 130,000. The main objective is to identify turbulence effective modelling strategies for unsteady RANS computations. For this reason both effective viscosity and stress-transport models have been used with different strategies for the modelling of near-wall turbulence which include standard log-law-based, and more refined wall functions, the latter based on the analytical solution of 1-D equations for the transport of wall-parallel momentum. The models' effectiveness is assessed through comparisons with available experimental and Large Eddy Simulation (LES) data. It is important that these present studies are in a good agreement with those obtained by the decreasing drag coefficient and increasing lift coefficient when a spin ratios (α : proportional tangential velocity of the cylinder wall to inlet flow velocity) of a cylinder grow up. Moreover, the stability of the flow domain is well improved with the suppressed vortex shedding, as well. Significantly, the prediction of the position of stagnation and separation flow position correspond to the magnitude of lift, drag coefficient and the rotation direction. Overall, this research has confirmed that the RSMs is capable to examine the external flow and more sensitized on the curvature surface flow .
    Original languageEnglish
    Title of host publicationWorld Congress on Mechanical, Chemical, and Material Engineering
    Publication statusPublished - 9 Jun 2017
    Event3rd World Congress on Mechanical, Chemical, and Material Engineering (MCM'17), Rome, Italy - Rome Italy
    Duration: 9 Jun 201710 Jun 2017

    Conference

    Conference3rd World Congress on Mechanical, Chemical, and Material Engineering (MCM'17), Rome, Italy
    Period9/06/1710/06/17

    Keywords

    • Reynolds stresses equation model, linear k-ε, rotating cylinder, Magnus effect, high Reynolds number, rotating cylinder, turbulence modelling.

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