On electro-kinetic fluids: One dimensional configurations

Rolf Ryham, Chun Liu, Zhi Qiang Wang

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Electro-kinetic fluids can be modeled by hydrodynamic systems describing the coupling between fluids and electric charges. The system consists of a momentum equation together with transport equations of charges. In the dynamics, the special coupling between the Lorentz force in the velocity equation and the material transport in the charge equation gives an energy dissipation law. In stationary situations, the system reduces to a Poisson-Boltzmann type of equation. In particular, under the no flux boundary conditions, the conservation of the total charge densities gives nonlocal integral terms in the equation. In this paper, we analyze the qualitative properties of solutions to such an equation, especially when the Debye constant ε approaches zero. Explicit properties can be derived for the one dimensional case while some may be generalized to higher dimensions. We also present some numerical simulation results of the system.

Original languageEnglish (US)
Pages (from-to)357-371
Number of pages15
JournalDiscrete and Continuous Dynamical Systems - Series B
Issue number2
StatePublished - Mar 2006

All Science Journal Classification (ASJC) codes

  • Discrete Mathematics and Combinatorics
  • Applied Mathematics


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