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Boundary effects in the Rayleigh line for a fluid out of thermal equilibrium

Author

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  • Pagonabarraga, I.
  • Rubí, J.M.
  • Torner, L.

Abstract

We analyze the effect of boundary conditions in the Rayleigh spectrum of a fluid under a temperature gradient. A specific wave vector geometry prevents coupling between temperature and velocity fluctuations and could make boundary effects observable. These effects are introduced by means of dimensionless numbers, which combine both the nature of the contact surfaces and the size of the system. We then show that the height of the peak as well as the total intensity under the Rayleigh line are modified by the presence of the walls.

Suggested Citation

  • Pagonabarraga, I. & Rubí, J.M. & Torner, L., 1991. "Boundary effects in the Rayleigh line for a fluid out of thermal equilibrium," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 173(1), pages 111-124.
    • Handle: RePEc:eee:phsmap:v:173:y:1991:i:1:p:111-124
    DOI: 10.1016/0378-4371(91)90253-9
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    References listed on IDEAS

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    1. Goldhirsch, Isaac & Procaccia, Itamar, 1981. "The number of propagating modes in hydrodynamic systems," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 105(1), pages 330-336.
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    Cited by:

    1. Segrè, P.N. & Schmitz, R. & Sengers, J.V., 1993. "Fluctuations in inhomogeneous and nonequilibrium fluids under the influence of gravity," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 195(1), pages 31-52.

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