Oscillatory Momentum Transport Mechanisms in Transitional Complex Geometry Flows

[+] Author and Article Information
D. Majumdar, C. H. Amon

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213

J. Fluids Eng 119(1), 29-35 (Mar 01, 1997) (7 pages) doi:10.1115/1.2819114 History: Received November 27, 1995; Revised August 12, 1996; Online December 04, 2007


This work reports direct numerical simulations of transitional flows in communicating channels. Above a critical Reynolds number, the flow becomes fluctuating and self-sustained with vortical motions temporally synchronized with channel traveling waves. The energy transfer mechanism between the mean and the fluctuating flow is investigated along with the distributions of oscillatory shear stress and transitional viscosity. The kinetic energy equation for the fluctuating velocity is solved from DNS data to evaluate the contributions of the production term, viscous dissipation, work of dynamic pressure and work of viscous shear stresses.

Copyright © 1997 by The American Society of Mechanical Engineers
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