Phase equilibria of size- and charge-asymmetric primitive models of ionic fluids: the method of collective variables

作者：Patsahan O V^*; Patsahan T M

来源：Condensed Matter Physics, 2010, 13(2): 23004.

• size- and charge asymmetric primitive models
• coexistence curves
• gas-liquid critical point
• method of collective variables

We study the phase diagrams of z:1 size-asymmetric primitive models (PMs) using a theory that exploits the method of collective variables. Based on the explicit expression for the relevant chemical potential (conjugate to the order parameter) which includes the correlation effects up to the third order we consider some particular cases of asymmetric PMs (1:1, 2:1 and 3:1 systems). Coexistence curves and critical parameters are calculated as functions of size ratio lambda = sigma(+)/sigma(-).

• 出版日期2010