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Enhanced Bubble Migration in Turbulent Channel Flow by an Acceleration-Dependent Drag Coefficient

  • J. G. M. Kuerten
  • C. W. M. van der Geld
  • B. J. Geurts
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 110)

Abstract

DNS of turbulent bubble-laden channel flow has been used with one-way coupling to investigate consequences of a postulated dependence of acceleration on drag. This dependence is known to hold for converging and diverging steady streamlines, and is here postulated to also exist for the instantaneous acceleration of micro-bubbles that arises from turbulent velocity fluctuations. Bubble segregation is found to be considerably increased through this dependency of drag on acceleration, particularly for smaller bubbles.

Keywords

Drag Force Direct Numerical Simulation Lift Force Small Bubble Turbulent Channel Flow 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • J. G. M. Kuerten
    • 1
  • C. W. M. van der Geld
    • 1
  • B. J. Geurts
    • 2
    • 3
  1. 1.Department of Mechanical EngineeringEindhoven University of TechnologyEindhoven
  2. 2.Department of Applied MathematicsUniversity of Twente
  3. 3.AE Enschede and Department Applied PhysicsEindhoven University of TechnologyEindhoven

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