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Torque-coupling and particle–turbulence interactions

Published online by Cambridge University Press:  28 February 2012

Helge I. Andersson ,
Lihao Zhao  and
Mustafa Barri
Helge I. Andersson*
Affiliation:
Department of Energy and Process Engineering, The Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
Lihao Zhao
Affiliation:
Department of Energy and Process Engineering, The Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
Mustafa Barri
Affiliation:
Department of Energy and Process Engineering, The Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
*
†Email address for correspondence: helge.i.andersson@ntnu.no
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Abstract

A novel scheme for strong coupling between inertial Lagrangian point particles and a continuous Eulerian fluid phase has been developed. A full mechanical coupling can only be achieved if torque-coupling is applied along with the more conventional force-coupling. The torque vector acting from the particles on the fluid is expressed in terms of a new antisymmetric particle stress tensor which adds to the Stokes stress tensor. A strongly-coupled simulation of a turbulent channel flow laden with prolate spheroidal particles with aspect ratio 5:1 demonstrated that the inclusion of torque-coupling reduced the modulation of the turbulent flow field observed in a two-way force-coupled simulation. The spin and orientation of the spheroids were significantly affected.

JFM classification

Multiphase and Particle-laden Flows: Particle/fluid flow Complex Fluids: Suspensions Turbulent Flows: Turbulence simulation
Type
Papers
Information
Journal of Fluid Mechanics , Volume 696 , 10 April 2012 , pp. 319 - 329
Copyright
Copyright © Cambridge University Press 2012

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