Brillouin scattering from thermal fluctuations of a thin membrane in a viscous fluid

A calculation is presented of the shape of the Brillouin spectra of light scattered from thermally excited waves in a thin membrane immersed in a viscous fluid. The motion of the fluid-membrane-fluid system is obtained by combining the Navier-Stokes equations with equations of motion for a viscoelas...

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Bibliographic Details
Published inJournal of colloid and interface science Vol. 42; no. 1; pp. 120 - 130
Main Authors Hestenes, John D, Chang, David B
Format Journal Article
LanguageEnglish
Published Elsevier Inc 1973
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Summary:A calculation is presented of the shape of the Brillouin spectra of light scattered from thermally excited waves in a thin membrane immersed in a viscous fluid. The motion of the fluid-membrane-fluid system is obtained by combining the Navier-Stokes equations with equations of motion for a viscoelastic membrane. The extent to which the motion is thermally excited is estimated from the fluctuation-dissipation theorem. The form of the light scattering cross section is obtained by using the thermally excited density fluctuations to calculate an induced dipole spectrum. Numerical results are presented and the conditions for fluid or membrane dominance of the motion are discussed.
ISSN:0021-9797
1095-7103
DOI:10.1016/0021-9797(73)90014-3