Nonlinear resonant coupling between shear and heat fluctuations in fluids far from equilibrium

Abstract
Fluctuating hydrodynamics is used to show that in fluids with large temperature gradients the shear mode couples to the heat mode in a resonant manner that results in a very large increase in the amplitude of the central peak of the spectrum of scattered light, in agreement with the results of Kirkpatrick et al. [Phys. Rev. A 26, 995 (1982)].