摘要
研究了导电和非导电两种壁型多孔微通道的熔融和滑移效应对混合对流换热的影响。采用高阶常微分非线性耦合模型,研究了横向磁场作用下流体在微通道内注入和喷出的流动力学。这些都是在通过相似变换完成的。采用解析解的同伦摄动方法对控制热流体输运的力学模型进行了分析,并利用已有文献在简单条件下进行了验证并得到满意的结果。研究了流体输送过程中传热流变参数的影响,以提高系统运行效率,降低能耗,从而最大限度地降低成本。结果表明,熔体和辐射对热边界层的共同作用使热边界层的厚度逐渐减小。当辐射参数(R)在1<R<5范围内增加时,微通道中板处的热廓线从−0.4804减小到−1.3081。该研究为磁流体动力学熔融金属和熔盐泵以及其他实应用提供参考。
This study evaluates the melting and slip effect on mixed convective heat transfer through porous micro channel having electrical conducting and non-conducting walls.The flow mechanics of the fluid injection and ejection through the micro channel under the transverse magnetic field is developed using nonlinear coupled model of higher order ordinary differentials.These are non-sensationalized with the aid of similarity transforms.The model governing the mechanics of thermal fluid transport is analyzed using the Homotopy perturbation method of analytical solution,which is validated for simple conditions using existing literatures that show satisfactory results.The effect of rheological parameters of heat transfer during fluid transport is presented in the bid to enhance system operations lowering energy utilization consequently minimizing cost.Obtained results reveal that combined effect of melt and radiation on the thermal boundary layer steadily lowers its thickness.Also rise in radiation parameter(R)ranging in 1<R<5 reveals thermal profile decreases from−0.4804 to−1.3081 at the mid plate of the micro channel.The study provides useful insight in engineering science applications including magneto hydrodynamics molten metal and molten salt pumps among other practical,yet useful applications.
关键词
强化传热
熔融
微通道
辐射
优化
多孔介质
enhanced heat transfer
melting
micro channel
radiation
optimization
porous medium
