Rayleigh peak in a molecular fluid in the presence of a temperature gradient

摘要: The study of fluctuations around nonequilibrium steady states has shown a very interesting behavior when we calculate the density-density correlation function. In particular, intensity Rayleigh peak is enhanced as consequence resonant coupling between heat mode induced on system by external means and transversal velocity modes. Here consider kinetic model for molecular fluid, obtain equations motion, such an effect. Our results reproduce calculated measured characteristics spectra show in explicit way how internal degrees freedom molecule modify structure factor.