Journal article

Lift and drag forces acting on a particle moving in the presence of slip and shear near a wall

Nilanka IK Ekanayake, Joseph D Berry, Dalton JE Harvie

JOURNAL OF FLUID MECHANICS | CAMBRIDGE UNIV PRESS | Published : 2021

Abstract

The lift and drag forces acting on a small spherical particle moving with a finite slip in single-wall-bounded flows are investigated via direct numerical simulations. This study is an extension of our previous work that considered the lift and drag forces acting on a sphere moving near a wall in the presence shear, but in the absence of slip (Ekanayake et al., J. Fluid Mech., vol. 904, 2020, A6). The effect of slip velocity on the particle force is analysed as a function of separation distance for low slip and shear Reynolds numbers (and) in both quiescent and linear shear flows. A generalised lift model valid for arbitrary particle-wall separation distances and is developed based on the re..

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Grants

Awarded by Australian Research Council


Funding Acknowledgements

Support from the Australian Research Council (LP160100786) and CSL is gratefully acknowledged. One of the authors (N.E.) acknowledges the support from the Melbourne Research Scholarships program of The Melbourne University.