Wood Jeffery A, Benneker Anne M, Lammertink Rob G H
Soft Matter, Fluidics and Interfaces, Mesa+Institute for Nanotechnology, University of Twente, 7500AE Enschede, The Netherlands.
J Phys Condens Matter. 2016 Mar 23;28(11):114002. doi: 10.1088/0953-8984/28/11/114002. Epub 2016 Feb 23.
A non-isothermal formulation of the Poisson-Nernst-Planck with Navier-Stokes equations is used to study the influence of heating effects in the form of Joule heating and viscous dissipation and imposed temperature gradients on a microchannel/nanochannel system. The system is solved numerically under various cases in order to determine the influence of temperature-related effects on ion-selectivity, flux and fluid flow profiles, as well as coupling between these phenomena. It is demonstrated that for a larger reservoir system, the effects of Joule heating and viscous dissipation only become relevant for higher salt concentrations and electric field strengths than are compatible with ion-selectivity due to Debye layer overlap. More interestingly, it is shown that using different temperature reservoirs can have a strong influence on ion-selectivity, as well as the induced electrohydrodynamic flows.
采用泊松-能斯特-普朗克方程与纳维-斯托克斯方程的非等温公式，研究焦耳热和粘性耗散形式的热效应以及施加的温度梯度对微通道/纳米通道系统的影响。在各种情况下对该系统进行数值求解，以确定与温度相关的效应对离子选择性、通量和流体流动剖面的影响，以及这些现象之间的耦合。结果表明，对于较大的储液器系统，焦耳热和粘性耗散的效应仅在盐浓度和电场强度高于因德拜层重叠而与离子选择性兼容的情况下才变得显著。更有趣的是，研究表明使用不同的温度储液器会对离子选择性以及诱导的电流体动力学流动产生强烈影响。
