DOI: 10.1017/s0022112094000911. An experimental investigation of concentrated suspension flows in a rectangular channel

An experimental investigation of concentrated suspension flows in a rectangular channel

10.1017/s0022112094000911

Crossref journal-article

Cambridge University Press (CUP)

Journal of Fluid Mechanics (56)

Abstract

An experimental adaptation of the well-known laser-Doppler anemometry technique is developed for measuring the velocity and concentration profiles in concentrated suspension flows. To circumvent the problem of optical turbidity, the refractive indices of the solid and liquid phases are closely matched. The residual turbidity, owing to small mismatches of the refractive indices, as well as impurities in the particles, allows a Doppler signal to be detected when a particle passes through the scattering volume. By counting the number of Doppler signals in a period of time, the local volume fraction is also measured.This new technique is utilized to study concentrated suspension flows in a rectangular channel. The general behavior of the suspension is that the velocity profile is blunted while the concentration profile has a maximum near the centre. Comparisons are made with theoretical predictions based on the shear-induced particle migration theory.

Bibliography

Koh, C. J., Hookham, P., & Leal, L. G. (1994). An experimental investigation of concentrated suspension flows in a rectangular channel. Journal of Fluid Mechanics, 266, 1â32.

Authors 3

Christopher J. Koh (first)
Philip Hookham (additional)
L. G. Leal (additional)

References 33 Referenced 230

Jenkins, J. T. & McTigue, D. F. 1993 Viscous fluctuations and the rheology of concentrated suspensions.J. Fluid Mech. submitted.
McMahon, T. A. & Parker, R. R. 1975 Particles in tube flow at moderate Reynolds number.Trans. Soc. Rheol. 19,445.
Timmermans, L. 1965 Physico-Chemical Constants of Pure Organic Compounds .Vol. 2. Elsevier.
Karnis, A. , Goldsmith, H. L. & Mason, S. G. 1966 The kinetics of flowing dispersions: I. concentrated suspension of rigid particles.J. Colloid Sci. 22,531.
Drain, L. E. 1980 The Laser Doppler Techniques .John Wiley and Sons.
Conaghan, B. F. & Rosen, S. L. 1972 The optical properties of two-phase polymer systems: single scattering in monodisperse, non-adsorbing systems.Polymer Engng Sci. 2,12.
Kowalewski, T. A. 1984 Concentration and velocity measurements in the flow of droplet suspensions through a tube.Exps Fluids 2,213.
Sinton, S. W. & Chow, A. W. 1991 NMR flow imaging of fluids and solid suspensions in Poiseuilleflow.J. Rheol. 35,735.
Leighton, D. & Acrivos, A. 1987 The shear-induced migration of particles in concentrated suspensions.J. Fluid Mech. 181,415.
Phillips, R. J. , Armstrong, R. C. , Brown, R. A. , Graham, A. & Abbot, J. R. 1992 A constitutive equation for concentrated suspensions that accounts for shear-induced particle migration.Phys. Fluid A4,30.
Kim, S. & Karrila, S. J. 1991 Microhydrodynamics .Butterworth-Heinemann,Boston, MA.
Segré, G. & Silberberg, A. 1962 Behaviour of macroscopic rigid spheres in Poiseuille flow. Parts 1 and 2.J. Fluid Mech. 14,115,136.
Gadala-Maria, F. & Acrivos, A. 1980 Shear-induced structure in a concentrated suspension of solid spheres.J. Rheol. 24,799.
Hookham, P. A. 1986 Concentration and velocity measurements in suspensions flowing through a rectangular channel.PhD thesis,California Institute of Technology.
Karnis, A. & Mason, S. G. 1967 Particle motions in sheared suspensions. XIX. Viscoelastic media.Trans. Soc. Rheol. 10,571.
Happel, J. & Brenner, H. 1965 Low Reynolds Number Hydrodynamics .Prentice-Hall.
Gauthier, F. , Goldsmith, H. L. & Mason, S. G. 1971 Particle motions in non-Newtonian media II. Poiseuille flow.Trans. Soc. Rheol. 15,297.
Adrian, R. J. 1978 Laser velocimetry. T. & M Rep. 442.University of Illinois, Dept of Theoretical and Applied Mechanics,Urbana, IL, USA.
Nott, P. R. & Brady, J. F. 1993 Pressure-driven flow of suspensions: simulations and theory.J. Fluid Mech. submitted. (10.1017/S0022112094002326)
Kowalewski, T. A. 1987 An experimental study of the lateral migration of a droplet in a creeping flow.Exps Fluids 5,43.
Koh, C. J. 1991 Experimental and theoretical studies on two-phase flows.PhD thesis,California Institute of Technology.
Abbot, J. R. , Tetlow, N. , Graham, A. L. , Altobelli, S. A. , Fukushima, E. , Mondy, L. A. & Stephens, T. S. 1991 Experimental observations of particle migration in concentrated suspensions: Couette flow.J. Rheol. 35,773. (10.1122/1.550157)
Segré, G. & Silberberg, A. 1963 Non-Newtonian behavior of dilute suspensions of macroscopic spheres in a capillary viscometer.J. Colloid Intl Sci. 18,312.
Van de Hulst, H. C. 1957 Light Scattering by Small Particle .Wiley. (10.1063/1.3060205)
Leal, L. G. 1980 Particle motions in a viscous fluid.Ann Rev. Fluid Mech. 12,435.
Durani, T. S. & Greated, C. A. 1977 Laser Systems in Flow Measurements .Plenum Press. (10.1007/978-1-4613-4106-2)
Drain, L. E. 1972 Coherent and noncoherent methods in Doppler optical beat velocity measurement.J. Phys. D Appl. Phys. 5,481.
Jenkins, J. T. & McTigue, D. F. 1990 Transport processes in concentrated suspensions: the role of particle fluctuations.In Two-Phase Flows and Waves . ed. D. D. Joseph & D. G. Schaeffer , pp.70–79.Springer. (10.1007/978-1-4613-9022-0_5)
Krieger, I. M. 1972 Rheology of monodisperse lattices.Adv. Colloid Interface Sci. 3,111.
Fahraeus, R. & Lindquist, T. 1931 The viscosity of the blood in narrow capillary tubes.Am. J. Physiol. 96,562.
Kowalewski, T. A. 1980 Velocity profiles of suspension flowing through a tube.Arch. Mech. 32,857.
Adrian, R. S. & Earley, W. 1976 Evaluation of LDV performance using Mie scattering theory. Minnesota Symposium on Laser Anemometry Proceedings, Oct. 22–24, 1975, Bloomington, MN .University of Minnesota, Dept of Conferences, Minneapolis.
Nouri, J. M. , Whitelaw, J. H. & Yianneskis, M. 1986 An investigation of refractive-index matching of continuous and discontinuous phases. Third Intl Symp. on Applications of Laser Anemometry to Fluid Mech .Portugal.

Dates

Type	When
Created	19 years, 3 months ago (April 27, 2006, 7:20 a.m.)
Deposited	6 years, 2 months ago (June 7, 2019, 12:14 p.m.)
Indexed	4 months, 4 weeks ago (March 22, 2025, 4:54 a.m.)
Issued	31 years, 3 months ago (May 10, 1994)
Published	31 years, 3 months ago (May 10, 1994)
Published Online	19 years, 3 months ago (April 26, 2006)
Published Print	31 years, 3 months ago (May 10, 1994)

Funders 0

None

BibTeX

@article{Koh_1994, title={An experimental investigation of concentrated suspension flows in a rectangular channel}, volume={266}, ISSN={1469-7645}, url={http://dx.doi.org/10.1017/s0022112094000911}, DOI={10.1017/s0022112094000911}, journal={Journal of Fluid Mechanics}, publisher={Cambridge University Press (CUP)}, author={Koh, Christopher J. and Hookham, Philip and Leal, L. G.}, year={1994}, month=may, pages={1–32} }

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