高温高压下带电胶体颗粒热泳特性分析  

Thermophoretic Characteristics of Charged Colloidal Particles under High Temperature and High Pressure

作　　者：周懿 尹世杰 杨洋[1] 郭盼盼 ZHOU Yi;YIN Shijie;YANG Yang;GUO Panpan(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;College of General Aviation and Flight,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]南京航空航天大学通用航空与飞行学院,南京210016 [3]西安交通大学能源与动力工程学院,西安710049

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第3期454-459,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金青年基金(51806157)。

摘　　要：文中以高温高压条件下带电胶体颗粒在水溶液中的热泳为研究对象,基于能量守恒方程、泊松方程、能斯特-普朗克方程、连续性方程和斯托克斯方程建立仿真模型.结果表明:高温高压条件加速颗粒在水溶液中的热泳.当双电层相对于颗粒半径较厚时,双电层形变为主要因素,较高温度可增大热泳系数;当双电层较薄时,热电效应为主要因素,温度的上升反而减小热泳系数.若颗粒热导率远高于水溶液热导率,由此形成的非线性温度场会严重削弱双电层较薄时的颗粒热泳.Based on the energy conservation equation,Poisson equation,Nernst-Planck equation,continuity equation and Stokes equation,the thermophoresis of charged colloidal particles in aqueous solution was studied.The results show that high temperature and high pressure will accelerate the thermophoresis of particles in aqueous solution.When the electric double layer is thick relative to the particle radius,the deformation of the electric double layer is the main factor,and higher temperature can increase the thermophoresis coefficient.When the electric double layer is thin,the thermoelectric effect is the main factor,and the increase of temperature decreases the thermophoresis coefficient.If the thermal conductivity of particles is much higher than that of aqueous solution,the resulting nonlinear temperature field will seriously weaken the thermal swimming of particles when the electric double layer is thin.

关 键 词：纳米流体 高温高压条件 双电层 热泳 热泳系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]