Acoustical Properties of Superfluid Helium in Confined Geometry

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dc.creatorKekutia, Sh. E.
dc.creatorChkhaidze, N. D.
dc.date2006-04-07
dc.date.accessioned2026-07-07T07:05:21Z
dc.date.available2026-07-07T07:05:21Z
dc.descriptionThe problem studied in this paper is to obtain the equations describing sound propagation in a consolidated porous medium filled with superfluid, determine the elastic coefficients, appearing in the equations, in terms of physically measurable quantities, and calculate the propagation velocities of transverse and longitudinal waves at high and low oscillating frequencies. In general, the obtained equations describe all volume modes that can propagate in a porous medium saturated with superfluid for any values of the porosity and frequencies. The derived equations are applied to the most important particular case when the normal component of superfluid helium is locked inside a highly porous media (aerogel, Im-helium sample) by viscous forces. For this case the velocities of two longitudinal sound modes and transverse mode are calculated from the derived equations. There are established the coupling between temperature and pressure oscillations in these fast and slow modes.
dc.description26
dc.identifierhttps://arxiv.org/abs/cond-mat/0604193
dc.identifierhttp://arxiv.org/abs/cond-mat/0604193
dc.identifierSh. E. Kekutiya and N. D. Chkhaidze. Sound propagation in a porous medium filled with superfluid helium. Low Temp. Phys.28, N11, (2002), 795-802
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/109637
dc.subjectSoft Condensed Matter
dc.subjectMaterials Science
dc.titleAcoustical Properties of Superfluid Helium in Confined Geometry
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