三维汤川气体的等温物态方程
Isothermal Equation of State of Three Dimensional Yukawa Gas
摘要：
采用分子动力学（MD）方法模拟了粒子约束对三维汤川气体压强的影响。在MD模拟中，采用完全反射边界条件考虑了约束效应。得到了压力与数密度之间的状态方程。MD模拟结果表明，在弱耦合区，封闭Yukawa气体的压力远大于动压，且与数密度成二次方关系。结果与早期的理论和实验相比，显示二次缩放的粉尘压力与密度。
英文摘要：
Molecular Dynamics (MD) simulation is carried out to examine the effect of particle confinement on the pressure of 3D Yukawa gas. Confinement effects are taken into account by using perfectly reflecting boundary condition in MD simulations. An equation of state relating pressure to number density is obtained. The results of the MD simulations show that in weak coupling regime pressure of confined Yukawa gas is much bigger than the kinetic pressure and scales quadratically with number density. Results are compared with earlier theories and experiments which show quadratic scaling of dust pressure with density.
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