小体积比两相分离早期过程的三维格子气模型研究*
Study on early stage of phase-separation process with low volume ratio using lattice gas model in three dimensions*
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摘要: 采用 Monte Carlo 模拟方法研究了小体积比三维格子气模型中的相分离过程,比较了 sc, fcc, bcc 等3种晶格类型和 T/Tc =0.45-0.85等5个相对温度的系统演化行为,计算了系统的结构因子函数,发现结构因子在相分离早期不满足标度关系,生长指数等于1/6,小于经典 Lifshitz-Slyozov 理论的值.
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关键词:
- 格子气模型 /
- 相分离过程 /
- Monte Carlo 模拟 /
- 生长律
Abstract: The phase separation process in a three-dimensional lattice gas model with a low volume ratio c = 0.01 was studied. Using Monte Carlo simulation, the evolution behaviors of sc, fcc, bcc lattices, and 5 relative temperatures T/Tc = 0.45-0.85 were simulated. It was found that the structure factor functions did not satisfy the scaling relationship, and the growth index was 1/6, less than the value of Lifshitz-Slyozov theory. -
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