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| 矩形电渗流道中焦耳热效应的数值模拟研究 | |
| 引用本文： | 张鹏,左春柽,周德义.矩形电渗流道中焦耳热效应的数值模拟研究[J].精细化工,2006,23(6):571-574. |
| 作者姓名： | 张鹏 左春柽 周德义 |
| 作者单位： | 1. 吉林大学,机械科学与工程学院,吉林,长春,130022 2. 吉林大学,机械科学与工程学院,吉林,长春,130022;浙江大学,流体传动及控制国家重点实验室,浙江,杭州,310027 3. 吉林大学,生物与农业工程学院,吉林,长春,130022 |
| 基金项目： | 高等学校博士学科点专项科研项目;国家重点实验室基金 |
| 摘 要： | 对玻璃和聚二甲基硅氧烷(PDMS)制成的矩形微流道中电渗流(EOF)的温度场进行了数值模拟研究。焦耳热效应的数学模型包括控制电势场的Poisson-Boltzm ann方程,控制流场的修正Navier-Stokes方程和控制温度场的能量方程。电势场、流场和温度场通过与温度有关的流体属性耦合在一起,将耦合的控制方程简化之后,应用有限元方法完成了矩形电渗流道中温度场的仿真计算。数值模拟结果表明,相同条件下,PDMS制成的微流道中的溶液温度明显高于玻璃制成的微流道中的溶液温度,且尺寸较大的PDMS流道中(h=48μm,b=96μm)的溶液温度明显高于尺寸较小的PDMS流道(h=32μm,b=96μm)中的溶液温度。 |
| 关 键 词： | 微流控 焦耳热效应 电渗流 矩形微流道 流道尺寸 数值模拟 |
| 文章编号： | 1003-5214（2006）06-0571-04 |
| 收稿时间： | 2005-09-29 |
| 修稿时间： | 2005-09-292005-11-04 |
Numerical Simulation on Joule Heating Effect of Electroosmotic Flow in Rectangular Microchannels |
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| ZHANG Peng,ZUO Chun-cheng,ZHOU De-yi.Numerical Simulation on Joule Heating Effect of Electroosmotic Flow in Rectangular Microchannels[J].Fine Chemicals,2006,23(6):571-574. | |
| Authors: | ZHANG Peng ZUO Chun-cheng ZHOU De-yi |
| Affiliation: | 1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, Jilin, China ; 2. The State Key Laboratory of Fluid Power Transmission and Control, Zhefiang University, Hangzhou 310027, Zhejiang , China ; 3. College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, Jilin , China |
| Abstract: | Joule heating effect of the temperature fields during electroosmosis in glass and polydimethylsiloxane(PDMS) rectangular microchannels is numerically investigated.The mathematical model of Joule heating effects includes Poisson-Boltzmann equation governing the electric double layer field,the modified Navier-Stokes equations governing the flow field,and the energy equation governing the temperature field due to Joule heating.These fields are strongly coupled via temperature dependent liquid properties.Computations for the temperature field during electroosmosis in the rectangular microchannels are performed with finite element method after simplifying the coupled governing equations.The numerical results indicate that the solution temperature in a PDMS made microchannel is significantly higher than that in a glass made microchannel.And the solution temperature in a bigger PDMS made microchannel(h=48 μm,b=96 μm) is significantly higher than that in a smaller PDMS made microchannel(h=32 μm,b=96 μm). |
| Keywords: | microfluidics Joule heating effect electroosmotic flow rectangular microchannels channel size numerical simulation |
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