Abstract
Numerical data of polymer drag reduced flows is interpreted in terms of modification of near-wall coherent structures. The originality of the method is based on numerical experiments in which boundary conditions or the governing equations are modified in a controlled manner to isolate certain features of the interaction between polymers and turbulence. As a result, polymers are shown to reduce drag by damping near-wall vortices and sustain turbulence by injecting energy onto the streamwise velocity component in the very near-wall region.
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Dubief, Y., Terrapon, V.E., White, C.M. et al. New Answers on the Interaction Between Polymers and Vortices in Turbulent Flows. Flow Turbulence Combust 74, 311–329 (2005). https://doi.org/10.1007/s10494-005-9002-6
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DOI: https://doi.org/10.1007/s10494-005-9002-6