Particle-wall collision in shear thinning fluids

Particle-wall collision in shear thinning fluids The present study deals with the measurements of the impact w i and rebound w r velocities of steel particles in different fluids colliding with a rigid wall. The results are presented in terms of the coefficient of restitution e=w r/w i as a function of the Stokes number (ratio between the particle inertia and the viscous forces). We focus the attention on possible differences between rebounds that occur in Newtonian fluids and in non-Newtonian, shear thinning fluids. The measurements of wet coefficients of restitution in Newtonian fluid are in good agreement with the experimental data found by Gondret et al. (2002). In the range of Stokes number investigated, an increase of the coefficient of restitution with the shear thinning fluid is clearly observed with respect to the Newtonian data. Particular attention has been dedicated to techniques of image processing to perform an optimal estimation of the particle centroid in highly noisy images. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Particle-wall collision in shear thinning fluids

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Publisher
Springer-Verlag
Copyright
Copyright © 2005 by Springer-Verlag
Subject
Engineering
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-005-0928-1
Publisher site
See Article on Publisher Site

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