RT Journal Article
T1 Long-wavelength nonequilibrium concentration fluctuations induced by the Soret effect
A1 Ortiz De Zárate Leira, José María
A1 Fornés, José Antonio
A1 Sengers, Jan V.
AB In this paper we evaluate the enhancement of nonequilibrium concentration fluctuations induced by the Soret effect when a binary fluid layer is subjected to a stationary temperature gradient. Starting from the fluctuating Boussinesq equations for a binary fluid in the large-Lewis-number approximation, we show how one can obtain an exact expression for the nonequilibrium structure factor in the long-wavelength limit for a fluid layer with realistic impermeable and no-slip boundary conditions. A numerical calculation of the wave-number dependence of the nonequilibrium enhancement and of the corresponding decay rate of the concentration fluctuations is also presented. Some physical consequences of our results are briefly discussed.
PB American Physical Society
SN 1539-3755
YR 2006
FD 2006-10
LK https://hdl.handle.net/20.500.14352/51239
UL https://hdl.handle.net/20.500.14352/51239
LA eng
NO © 2006 The American Physical Society.
DS Docta Complutense
RD 13 abr 2025