Dynamics and Thermal Structure of Gas-Liquid Phase Interface

The dynamics and the thermal structure of the gas-liquid phase interface is studied using nonequilibrium molecular dynamics simulation in Lennard-Jones particle system of three-dimension. The initial configuration of the system is in equilibrium state where the temperature and density keeps definite value. At t = 0, temperature gradient charges on the system box in x-direction and the system starts phase separation close to the steady state. From unstationary state, a gap of temperature profile ΔT(t) between gas phase and liquid phase is exposed and this interface profile is settled to a definite value ΔT _o with $1/\sqrt {t.}$ This ΔT _o is corresponding to a gap of the temperature profile in the steady state. This result suggests that the thermal resistance in the gas-liquid phase interface is shown in this scale