We have studied the dependence of thermal diffusion factor to the temperature for supercritical dense equimolar isotopic binary mixtures ofatoms by direct Nonequilibrium molecular dynamics simulation method. The results showed that for these systems the sign of thermal diffusion factor and slope of it with respect to the temperature is positive. For low mass ratio the variation ofthermal diffusion factor with temperature is very slow, and for higher mass ratio thermal diffusion factor increases with temperature. Based on the ratios ofcomponents ofenergy flux, microscopic mechanisms ofenergy transfer across the system are also analyzed.
