Diffusion Limit of Kinetic Equations for Multiple Species Charged Particles

Hao Wu, Tai Chia Lin, Chun Liu

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)419-441
Number of pages23
JournalArchive for Rational Mechanics and Analysis
Issue number2
StatePublished - Feb 2014

All Science Journal Classification (ASJC) codes

  • Analysis
  • Mathematics (miscellaneous)
  • Mechanical Engineering


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