A one-equation turbulence model is presented. The modeling tries to adopt a more reliable source and less empirical coefficients. The governing equation is the turbulent kinetic energy equation, in which ε is closed phenomenologically. The stress intensity ratio τ 12 / k is calibrated to be a function controlled by the local variables but not a constant 0.3. The extension of the Bradshaw assumption turns out to be of good accuracy, forming a new Reynolds stress constitutive relation. The two model coefficients are both extracted from one slice of the flat-plate boundary layer, yet extensive tests show that the model can significantly improve the precision of prediction for the boundary-layer flows, the adverse pressure gradient, shallow separation, transport effects, and massively separated flows.


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    Title :

    One-Equation Turbulence Model Based on Extended Bradshaw Assumption


    Contributors:
    Xu, Jinglei (author) / Zhang, Yang (author) / Bai, Junqiang (author)

    Published in:

    AIAA Journal ; 53 , 6 ; 1433-1441


    Publication date :

    2015-06-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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