Abstract

We analyze numerically the influence nonuniform asymmetric heating on the forced convective conjugate heat transfer characteristics for two-dimensional, steady flow of Newtonian fluid through a parallel plate microchannel. A parametric study is carried out by varying the phase difference, amplitude and period of fluctuation of the imposed heat flux, thickness and thermal conductivity of the walls as well as Reynolds number in the range of 25–600. Results reveal that there exists a complex interaction between the imposed heat flux profile and the physico-thermal properties of the walls in altering the thermal transport characteristics. The impact of asymmetric heating in altering the overall thermal transport rate is greater than the effect of nonuniform heating.

摘要

我们数值分析了非均匀不对称加热对二维、稳态牛顿流体通过平行板微通道的强制对流共轭传热特性的影响。通过在 25-600 范围内改变施加的热通量、壁厚和热导率以及雷诺数的相位差、幅度和波动周期来进行参数研究。结果表明，在改变热传输特性方面，施加的热通量分布与壁的物理热特性之间存在复杂的相互作用。不对称加热在改变整体热传输速率方面的影响大于非均匀加热的影响。