The nonequilibrium van der Waals square gradient model. (III). Heat and mass transfer coefficients

In the first paper we extended the van der Waals square gradient model for the equilibrium liquid–vapor interface to nonequilibrium systems. Both the density and the temperature depended on position and time. Heat transport and evaporation and condensation through the interface were described. In the second paper we defined and calculated the Gibbs excess densities for an arbitrary choice of the dividing surface and verified that this resulted in an autonomous description of the surface. A unique surface temperature was found.