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arXiv 1106.2698math.AP
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粒子池驱动下非弹性Boltzmann方程平衡态的弱非弹性唯一性

Uniqueness in the weakly inelastic regime of the equilibrium state of the inelastic Boltzmann equation driven by a particle bath

Marzia Bisi, José Alfredo Cañizo, Bertrand Lods

摘要:

本文研究了非弹性硬球(具有常数恢复系数$α\in (0,1)$)在具有固定麦克斯韦分布的主介质诱导的热化作用下的空间齐次Boltzmann方程.我们证明了在弱非弹性状态下定态解的唯一性(给定质量),即,对于任何非弹性参数$α\in (α_0,1)$,具有一些建设性的$α_0 \in [0, 1)$。我们的分析是基于微扰的论点,它使用的知识的固定解决方案的弹性极限和定量估计的收敛性固定解决方案的非弹性参数为1。为了实现这一点,我们给出了一个准确的谱分析的相关线性碰撞算子的弹性极限。这一独特的稳态$F_α$的几个定性性质也来自,特别是,我们证明了$F_α$是有界的从上面和下面的两个明确的普遍(即独立的$α$)麦克斯韦分布。

英文摘要:

We consider the spatially homogeneous Boltzmann equation for inelastic hard-spheres (with constant restitution coefficient $α\in (0,1)$) under the thermalization induced by a host medium with a fixed Maxwellian distribution. We prove uniqueness of the stationary solution (with given mass) in the weakly inelastic regime; i.e., for any inelasticity parameter $α\in (α_0,1)$, with some constructive $α_0 \in [0, 1)$. Our analysis is based on a perturbative argument which uses the knowledge of the stationary solution in the elastic limit and quantitative estimates of the convergence of stationary solutions as the inelasticity parameter goes to 1. In order to achieve this we give an accurate spectral analysis of the associated linearized collision operator in the elastic limit. Several qualitative properties of this unique steady state $F_α$ are also derived; in particular, we prove that $F_α$ is bounded from above and from below by two explicit universal (i.e. independent of $α$) Maxwellian distributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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