矩形微通道中压力驱动流体的热传导数值模拟

本文利用基于控制体积法的SIMPLEC算法对微通道中的压力驱动流体的热传导问题进行了数值模拟．首先通过Poisson-Boltzmann方程求解微通道中的电荷密度，然后通过包含了外加电场力的Navier-Stokes方程对电粘现象进行深入的研究．上述的方程通过与温度相关的介电常数，粘性系数以及热导率和能量方进行程耦合求解，进而研究了微管道的特征尺度和宽高比对Nusselt数（Nu）以及Poiseuille数（Po）的影响，研究发现，电粘效应和流体的热物理属性对于微管道中的Po数和Nu数有着非常显著的影响，尤其是热物理属性更为重要。

Numerical simulation of heat transfer in the pressure-driven rectangular micro-channel flows

A numerical analysis of heat transfer in the pressure-driven microchannel flows was carried out using the finite-control-volume based SIMPLEC algorithm. The surface potential andionic concentration distribution of dilute solutions in microchannels were investigated by numerically solving Poisson-Boltzmann equation.The induced electrical body force was considered in the firstly modified Navier-Stokes equation to describe the flow field. All these equations were coupled with energy equation through the temperature-dependent liquid dielectric constant ,viscosity, and thermal conductivity. By numerically solving these equations aforementioned simultaneously, effects of the channel size, and aspect ratio on the Nusselt number Nu and Poiseuille number Po were discussed in this paper,respectively.