Surface tension of a Yukawa fluid according to mean-field theory.

摘要: Yukawa fluids consist of particles that interact through a repulsive or attractive potential. A surface tension arises at the walls container encloses fluid interface between two coexisting phases. We calculate on level mean-field theory, thereby either ignoring particle size (ideal fluid) accounting for non-vanishing nonideal contribution to free energy, exemplified lattice gas (lattice based Carnahan-Starling equation state (Carnahan-Starling fluid). Our results, which do not rely assuming small gradients concentrations, become exact in limit large temperature and screening length. They are calculated numerically general case analytically limits concentration close critical point phase-separating system. For sufficiently concentration, our predicted is accurate whereas phase boundary, we expect good agreement with calculations length if model employs state.