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Several types of rotating and swirling ows for a range of Reynolds numbers and rotation rates or swirl intensities have been studied computationally, aimed at identifying speci c features that require special consideration in turbulence modeling. The ows considered include turbulent channel ows subjected to streamwise and spanwise rotation, with stationary and moving boundaries; developing and fully developed ows in axially rotating pipes; and swirling ows in combustor geometries and long pipes. Computations performed with three versions of the secondmoment closure and two eddy-viscosity models show that the second-moment models are superior, especially when the equations are integrated up to the wall. Such models reproduced the main ow parameters for all ows considered in acceptable agreement with the available experimental data and direct numerical simulations. However, challenges still …