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Wave Propagation in Dispersed Random Media

Published online by Cambridge University Press:  25 February 2011

Ping Sheng,
Xiaodun Jing and
Minyao Zhou
Ping Sheng
Affiliation:
Exxon Research & Engineering Co., Annandale, NJ 08801
Xiaodun Jing
Affiliation:
Exxon Research & Engineering Co., Annandale, NJ 08801
Minyao Zhou
Affiliation:
Exxon Research & Engineering Co., Annandale, NJ 08801
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Abstract

We present a generalized coherent potential approximation for the identification of quasi propagating modes in dispersed random media and the calculation of their dispersion relations. The validity of this approach is supported by multiple-scattering calculations, numerical simulation, and comparison with experimental data on acoustic excitations in colloidal suspensions. Our theory yields excellent quantitative agreement with the measured dispersion relations and provides an explanation for the observed frequency gaps in the excitations spectra.

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References

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