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Suspension dynamics: moving beyond steady

Published online by Cambridge University Press:  04 July 2014

Jason E. Butler
Jason E. Butler*
Affiliation:
Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA
*
†Email address for correspondence: butler@che.ufl.edu
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Abstract

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The dynamics of flowing, concentrated suspensions of non-colloidal particles continues to surprise, despite decades of work and the widespread importance of suspension transport properties to industrial processes and natural phenomena. Blanc, Lemaire & Peters (J. Fluid Mech., 2014, vol. 746, R4) report a striking example. They probed the time-dependent dynamics of concentrated suspensions of rigid and neutrally buoyant spheres by simultaneously measuring the oscillatory rheology and the sedimentation rate of a falling ball. The sedimentation velocity of the ball through the suspension depends strongly on the frequency of oscillation, though the rheology was found to be independent of frequency. The results demonstrate the complexities of suspension flows and highlight opportunities for improving models by exploring suspension dynamics and rheology over a wide range of conditions, beyond steady and unidirectional ones.

JFM classification

Multiphase and Particle-laden Flows: Particle/fluid flowNon-Newtonian Flows: RheologyComplex Fluids: Suspensions

Information

Type
Focus on Fluids
Information
Journal of Fluid Mechanics , Volume 752 , 10 August 2014, pp. 1 - 4
Copyright
© 2014 Cambridge University Press 

References

Acrivos, A. 1995 Shear-induced particle diffusion in concentrated suspensions of noncolloidal particles. J. Rheol. 39, 813–826; Bingham Award Lecture—1994.CrossRefGoogle Scholar
Blanc, F., Lemaire, E. & Peters, F. 2014 Tunable fall velocity of a dense ball in oscillatory cross-sheared concentrated suspensions. J. Fluid Mech. 746, R4.CrossRefGoogle Scholar
Brady, J. F. & Bossis, G. 1988 Stokesian dynamics. Annu. Rev. Fluid Mech. 20, 111–157.CrossRefGoogle Scholar
Bricker, J. M. & Butler, J. E. 2007 Correlation between stresses and microstructure in concentrated suspensions of non-Brownian spheres subject to unsteady shear flows. J. Rheol. 51, 735–759.CrossRefGoogle Scholar
Franceschini, F., Filippidi, E., Guazelli, É. & Pine, D. J. 2011 Transverse alignment of fibers in a periodically sheared suspension: an absorbing phase transition with a slowly-varying control parameter. Phys. Rev. Lett. 107, 250603.CrossRefGoogle Scholar
Gadala-Maria, F. & Acrivos, A. 1980 Shear-induced structure in a concentrated suspension of spheres. J. Rheol. 24, 799–814.CrossRefGoogle Scholar
Hinch, E. J. 2011 The measurement of suspension rheology. J. Fluid Mech. 686, 1–4.CrossRefGoogle Scholar
Lin, Y., Phan-Thien, N. & Khoo, B. C. 2013 Short-term and long-term irreversibility in particle suspensions undergoing small and large amplitude oscillatory stress. J. Rheol. 57, 1325–1346.CrossRefGoogle Scholar
Morris, J. F. 2009 A review of microstructure in concentrated suspensions and its implication for rheology and bulk flow. Rheol. Acta 48, 909–923.CrossRefGoogle Scholar
Nott, P. R. & Brady, J. F. 1994 Pressure-driven flow of suspensions: simulation and theory. J. Fluid Mech. 275, 157–199.CrossRefGoogle Scholar
Nott, P. R., Guazzelli, É. & Pouliquen, O. 2011 The suspension balance model revisited. Phys. Fluids 23, 043304.CrossRefGoogle Scholar