论文标题
使用动态密度功能理论对非弹性颗粒介质进行建模
Modelling inelastic granular media using Dynamical Density Functional Theory
论文作者
论文摘要
我们使用动态密度功能理论（DDFT）构建了一个新的介质介质模型。该模型既包括碰撞操作员，以融合非弹性性和Helmholtz自由能功能，以说明外部电势，颗粒间相互作用和体积排除。我们使用来自事件驱动的微观模拟的统计数据来确定未通过用于推导DDFT的封闭关系分析给出的参数。我们从数值上证明了DDFT中每个项的关键效应，以及包括准确的参数化对相关函数的重要性。
We construct a new mesoscopic model for granular media using Dynamical Density Functional Theory (DDFT). The model includes both a collision operator to incorporate inelasticity and the Helmholtz free energy functional to account for external potentials, interparticle interactions and volume exclusion. We use statistical data from event-driven microscopic simulations to determine the parameters not given analytically by the closure relations used to derive the DDFT. We numerically demonstrate the crucial effects of each term in the DDFT, and the importance of including an accurately parametrised pair correlation function.
