The present study considers the numerical modeling of the turbulent flow inside a rotor-statorcavity subjected or not to a superimposed throughflow. Extensive numerical predictions basedon one-point statistical modeling using a low Reynolds number second-order full stress transportclosure (RSM model) are performed mainly in the case of turbulent flows with merged boundarylayers known as turbulent torsional Couette flows and belonging to regime III of Daily and Nece (1960). The RSM model has already shown its capability of predicting accurately the mean and turbulentfields in various rotating disk configurations (Poncet, 2005; Poncet et al., 2005, 2007, 2008). For the first time, a detailed mapping of thehydrodynamic flow over a wide range of rotational Reynolds numbers (180 000≤Re≤10 000 000), aspect ratios of the cavity (0.02≤G≤0.05), and flow rate coefficients (−10000≤Cw≤10000) is here provided in the turbulent torsional Couette flow regime.
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