Direct Numerical Simulation of Turbulent Channel Flow of a Viscous Anisotropic Fluid

M. Manhart and R. Friedrich
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M. Manhart: Technische Universität München, Lehrstuhl für Fluidmechanik
R. Friedrich: Technische Universität München, Lehrstuhl für Fluidmechanik

A chapter in Lectures on Applied Mathematics, 2000, pp 277-296 from Springer

Abstract: Abstract Direct Numerical Simulations (DNS) of turbulent channel flow axe performed with a viscous anisotropic model to account for the effect of dilute polymer solutions in water. The model is based on the assumption that the polymer molecules behave like rigid elongated rods. In addition it is assumed that the average orientation angle of the molecules is parallel to the instantaneous flow vector. The results of the DNS with two different model parameters show a drag reduction compared to the Newtonian case. The evaluation of the averaged flow variables shows a change in turbulence structure that is in line with published data of turbulent channel or pipe flows of dilute polymer solutions.

Keywords: Turbulent Kinetic Energy; Direct Numerical Simulation; Drag Reduction; Bulk Velocity; Extensional Viscosity (search for similar items in EconPapers)
Date: 2000
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-59709-1_18

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DOI: 10.1007/978-3-642-59709-1_18

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