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Gas-Fluid and Fluid-Solid Phase Instability for Restricted Primitive Model

Gas-Fluid and Fluid-Solid Phase Instability for Restricted Primitive Model
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摘要 By considering the fluctuation of grand potential f~ around equilibrium with respect to small one-particle density fluctuations δpα(r→), the phase instability of restricted primitive model (RPM) of ionic systems is investigated. We use the integral equation theory to calculate the direct correlation functions in the reference hypernetted chain approximation and obtain the spinodai line of RPM. Our anaiysis explicitly indicates that the gas-fluid phase instability is induced by k = 0 fluctuation mode, while the fluid-solid phase instability is related to k ≠ 0 fluctuation modes. The spinodai line is qualitatively consistent with the result of computer simulations by others.
出处 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第8期356-360,共5页 理论物理通讯(英文版)
基金 Supported by National Natural Science Foundation of China under Grant No.10325418
关键词 phase instability restricted primitive model the reference hypernetted chain approximation 不稳定性 模型 流体流 天然气 计算机模拟 波动模式 积分方程理论 粒子密度
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