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首页> 外文期刊>International Journal of Thermal Sciences >Convective heat transfer of non-Newtonian power-law slip flows and plug flows with variable thermophysical properties in parallel-plate and circular microchannels
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Convective heat transfer of non-Newtonian power-law slip flows and plug flows with variable thermophysical properties in parallel-plate and circular microchannels

机译：非牛顿幂律滑流和具有可变热物理特性的塞流在平行板和圆形微通道中的对流传热

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摘要

In this study, the perturbation method was implemented to analytically solve the governing equations relevant to both hydrodynamically and thermally fully developed power-law fluid and plug flows through parallel-plates and circular microchannels under constant isoflux thermal and slip boundary condition. The temperature-dependent properties, being viscosity and thermal conductivity, were considered along with non-linear slip condition in the analysis in addition to viscous dissipation. The velocity, temperature and constant property Nusselt number closed form expressions were derived. Then, Nusselt number corresponding to temperature-dependent thermophysical properties was numerically obtained due to their complexity nature. Numerical simulations were also performed for verifying the analytical results. The results indicated that the property variations and slip condition significantly affected thermo-fluid characteristics, and these parameters should be included to achieve a better thermal design for microdevices. (C) 2015 Elsevier Masson SAS. All rights reserved.
机译：在这项研究中，采用摄动法来分析求解与流体动力学和热学完全发展的幂律流体和塞流在恒定等流量热和滑移边界条件下流过平行板和圆形微通道的控制方程式。除了粘性耗散外，还考虑了与温度有关的特性，即粘度和导热性，以及非线性滑移条件。推导了速度，温度和恒特性Nusselt数闭式表达式。然后，由于其复杂性，从数值上获得了与温度相关的热物理性质相对应的努塞尔数。还进行了数值模拟，以验证分析结果。结果表明，性能变化和滑移条件显着影响了热流体特性，应包括这些参数以实现微器件的更好的热设计。 （C）2015 Elsevier Masson SAS。版权所有。

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