arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.3053math.APmath-phmath.MP
收藏

多物种带电粒子动理学方程的扩散极限

Diffusion limit of kinetic equations for multiple species charged particles

Hao Wu, Tai-Chia Lin, Chun Liu

AI总结:

本文研究多物种带电粒子动理学方程的扩散极限,证明带反射边界的VPFP系统全局重整化解在小参数趋于零时收敛于PNP系统的全局弱解,为PNP作为多离子输运宏观模型提供理论支撑。

摘要:

在离子溶液中,存在多种具有不同质量、电荷等性质的带电粒子(离子)。泊松-能斯特-普朗克(Poisson-Nernst-Planck, PNP)系统这类宏观连续模型已被广泛用于描述溶剂中离子物种的输运与分布。本文从离子输运的动理学理论出发,研究有界域中带反射边界条件的弗拉索夫-泊松-福克-普朗克(Vlasov-Poisson-Fokker-Planck, VPFP)系统的电荷分布问题,并证明当与标度热速度和平均自由程相关的小参数趋于零时,VPFP系统的全局重整化解收敛于PNP系统的全局弱解。我们的结果可为PNP系统作为稀溶液中多物种离子输运宏观模型的合理性提供依据。

英文摘要:

In ionic solutions, there are multi-species charged particles (ions) with different properties like mass, charge etc. Macroscopic continuum models like the Poisson-Nernst-Planck (PNP) systems have been extensively used to describe the transport and distribution of ionic species in the solvent. Starting from the kinetic theory for the ion transport, we study a Vlasov-Poisson-Fokker-Planck (VPFP) system in a bounded domain with reflection boundary conditions for charge distributions and prove that the global renormalized solutions of the VPFP system converge to the global weak solutions of the PNP system, as the small parameter related to the scaled thermal velocity and mean free path tends to zero. Our results may justify the PNP system as a macroscopic model for the transport of multi-species ions in dilute solutions.

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。

↑