Travelling-waves consistent with turbulence-driven secondary flow in a square duct

Details Travelling-waves consistent with turbulence-driven secondary flow in a square duct Travelling-waves consistent with turbulence-driven secondary flow in a square duct

2010-11-01

arxiv.org/abs/1011.0442v1

M. Uhlmann, G. Kawahara, and A. Pinelli. Travelling-waves consistent with turbulence-driven secondary flow in a square duct. P

Physics

Fluid Dynamics

Scientific paper

10.1063/1.3466661

We present numerically determined travelling-wave solutions for pressure-driven flow through a straight duct with a square cross-section. This family of solutions represents typical coherent structures (a staggered array of counter-rotating streamwise vortices and an associated low-speed streak) on each wall. Their streamwise average flow in the cross-sectional plane corresponds to an eight vortex pattern much alike the secondary flow found in the turbulent regime.

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