J. Phys. II France
Volume 6, Numéro 5, May 1996
Page(s) 713 - 722
DOI: 10.1051/jp2:1996207
J. Phys. II France 6 (1996) 713-722

A Diffusing Wave Spectroscopy Study of Constrictive Flow of Foam

J.C. Earnshaw and M. Wilson

The Department of Pure and Applied Physics, The Queen's University of Belfast, Belfast BT7 1NN, Northern Ireland

(Received 29 May 1995, revised 8 January 1996, accepted 2 February 1996)

The dynamics of a model foam in constrictive flow have been studied by diffusing-wave spectroscopy. Below a threshold strain rate the rate at which elementary strain-induced rearrangements occur in the foam depends only on the strain, whereas above this threshold the rate is simply proportional to strain rate. A possible mechanism for the unexpected behaviour at low strain rates is outlined.

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