从粒子系统推导 Enskog--Enskog 系统
Derivation of the Enskog--Enskog System from a Particle System
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中文总结 AI 辅助
本文从硬球 BBGKY 层级正式推导出气体-粒子混合物的耦合 Enskog 系统,保留了碰撞中心有限分离,明确碰撞算子细节,为两相流提供动力学基础,并推导了平衡定律和熵不等式。
中文摘要 AI 辅助
我们正式地从硬球 BBGKY 层级推导出用于气体-粒子混合物的耦合 Enskog 系统。该推导保留了碰撞中心之间的有限分离,包括了种内和种间碰撞,并明确说明了空间位移的方向以及四个碰撞算子的质量相关前置因子。所得系统为体积效应不可忽略的两相流提供了一个动力学起点。对于单位接触因子,我们推导了相应的气体和粒子平衡定律,并在适当的正则性假设下建立了熵不等式。
英文摘要
We formally derive a coupled Enskog system for a gas--particle mixture from the hard-sphere BBGKY hierarchy. The derivation retains the finite separation between colliding centres, includes collisions within and between species and explicitly states the direction of spatial shifts and the mass-dependent prefactors of the four collision operators. The resulting system provides a kinetic starting point for two-phase flows for which the volume effect cannot be ignored. For unit contact factors, we derive the corresponding gas and particle balance laws, and establish an entropy inequality under suitable regularity assumptions.
发表机构
- Laboratoire MAP5, Université Paris Cité(巴黎西岱大学 MAP5 实验室)
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