phi(4) theory Hamiltonian for fluids: Application to the surface tension near the critical point

Article

关键词: LIQUID-VAPOR INTERFACE;    GINZBURG CRITERION;    AMPLITUDE;    SEPARATION;    SIMULATION;    EXPANSION;   

DOI  :  10.1103/PhysRevB.101.235414

来源: SCIE

【 摘 要 】

We show that the surface tension of fluid near the critical point may be correctly described by taking into consideration the microscopic structure of the system using a phi(4) field theory. We revise the theory of the surface tension near criticality to take into account a microscopic structure of the fluid. Focusing on the case of the Lennard-Jones fluid, we express the surface tension in terms of the compressibility of the reference hard-core system and its derivatives with respect to density. We demonstrate that the obtained analytical microscopic expression for the surface tension near the critical point is in a good agreement with numerical experiments, which emphasizes the impact of microscopic structure on the critical behavior of the surface tension in fluids. Our analysis provides a basis for studying the surface tension in small-volume systems important in many technological applications.

【 授权许可】

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