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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Print: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v22.i2.30
pages 56-65

The Near Wall Behaviour of Particles in a Simple Turbulent Flow with Gravitational Settling and Partially Absorbing Walls

Michael W. Reeks
School of Mechanical and Systems Engineering, Newcastle University, Stephenson Building, Newcastle upon Tyne NE1 7RU
D. C. Swailes
Dept. of Engineering Maths, Newcastle University, Newcastle upon Tyne, Northumbria, NE1 7RU, U.K.

ABSTRACT

The paper describes how a pdf model for particle dispersion with gravitational settling in turbulent flows can be used to model the natural boundary conditions arising from partially or perfectly absorbing boundaries. The validity of so called continuum models is shown to breakdown for wall distances less than or of the order of a particle mean free which is a natural length scale for the pdf equation.


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