平行微管道中高Zeta势下两层磁流体的电动流动及传热研究  

Electrokinetic Flow and Heat Transfer of Two-Layer Magnetofluids under High Zeta Potential in Parallel Microchannels

作　　者：张伟杰 王然 崔继峰[1] 陈小刚[1] ZHANG Weijie;WANG Ran;CUI Jifeng;CHEN Xiaogang(College of Sciences,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学理学院,呼和浩特010051

出　　处：《内蒙古农业大学学报（自然科学版）》2023年第1期78-86,共9页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：国家自然科学基金项目(12062018);内蒙古自治区自然科学基金项目(2020MS01015);内蒙古自治区高等学校青年科技英才支持计划资助项目(NJYT22075);内蒙古自治区直属高校基本科研业务费项目(JY20220331)。

摘　　要：本文研究了高Zeta势下平行微管道中两层磁流体电渗流动及传热特性。首先,通过有限差分法数值求解非线性Poisson-Boltzmann方程给出电势分布,计算相应的速度分布、温度分布及熵产。其次,分析了速度分布、温度分布和熵产随磁场Hartman数、两层流体的介电常数比、流体粘性比和界面电势差的变化趋势。最后,比较了低Zeta势和高Zeta势下两层流体速度分布、温度分布和熵产的变化规律。结果表明,随着Zeta势的增加,两层流体的速度、温度和熵产都随之增大。The electroosmotic flow and heat transfer characteristics of two-layer magnetofluid system under high Zeta potential in par-allel microchannels were investigated in this paper.Firstly,the numerical solutions for the electric potential distribution were given via solving the nonlinear Poisson-Boltzmann equation by using the finite difference method,and the velocity distribution,temperature distribution,and entropy generation were calculated.Secondly,the variation trends of the velocity distribution,temperature distribu-tion,and entropy generation were analyzed with the magnetic field Hartman number,the dielectric constant ratio,the fluid viscosity ratio,and the interface potential difference of two-layer fluids.Finally,the variation law of the velocity distribution,temperature distri-bution,and entropy generation of two-layer fluids were compared under the low Zeta potential and the high Zeta potential.The results showed that the velocities,temperatures,and entropy generations of two-layer fluids increased with the increase of Zeta potential.

关 键 词：高Zeta势 两层磁流体 平行微管道 有限差分法 

分 类 号：O357.1[理学—流体力学]