Effect of particle inertia and gravity on the turbulence in a suspension

Journal article (2005)

Authors

Department
Process and Energy (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2005 The Author(s); American Institute of Physics
DOI: https://doi.org/doi:10.1063/1.2139683
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Published Date

06-12-2005

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Source:

Physics of Fluids, 17 (12), 2005

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Abstract

A theoretical model is presented for the effect of particle inertia and gravity on the turbulence in a homogeneous suspension. It is an extension of the one-fluid model developed by L’vov, Ooms, and Pomyalov [Phys. Rev. E 67, 046314 (2003)] , in which the effect of gravity was not considered. In the extended model the particles are assumed to settle in the fluid under the influence of gravity due to the fact that their density is larger than the fluid density. The generation of turbulence by the settling particles is described, with special attention being paid to the turbulence intensity and spectra. A comparison is made with direct numerical simulation calculations and experimental data. Also a sensitivity study is carried out to investigate at which conditions the gravity effect becomes important.

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