Diffusing acoustic wave spectroscopy of fluidized suspensions


Page, J. H. ; Cowan, M. L. ; Weitz, D. A. Diffusing acoustic wave spectroscopy of fluidized suspensions. Physica B 2000, 279, 130-133. Copy at http://www.tinyurl.com/y48dhorc
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The velocity fluctuations and local strain rate in a fluidized suspension of particles are investigated using the new ultrasonic technique of diffusing acoustic wave spectroscopy. DAWS probes the relative motion of the particles at very short length scales down to the inter-particle separation, and allows the spatial correlations of the velocity fluctuations to be probed by varying the transport mean free path of the diffusing ultrasonic waves. Our results demonstrate the power of this ultrasonic technique to probe the dynamics of sedimenting particles at larger length scales and Reynolds numbers than can be achieved by light scattering methods. (C) 2000 Elsevier Science B.V. All rights reserved.


Times Cited: 11 5th International Conference on the Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5) Jun 21-25, 1999 Hong kong baptist univ, hong kong, hong kong Lee Hysan Fdn; Croucher Fdn; KC Wong Educ Fdn; Schlumberger Doll Res; ARO FE; AFOSR AOARD; ONRASIA

Last updated on 03/20/2014