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首页> 外文期刊>International Journal of Thermal Sciences >Mixed convection and radiation studies on thermally developing laminar flow in a horizontal square channel with variable side heated wall
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Mixed convection and radiation studies on thermally developing laminar flow in a horizontal square channel with variable side heated wall

机译：具有可变侧加热壁的水平方形通道中热显影层流的混合对流与辐射研究

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摘要

In this work presents the interaction of mixed convection and surface radiation heat transfer studies on thermally developing laminar airflow in a differentially heated horizontal channel with isothermal vertical walls and adiabatic top and bottom walls. The side heated isothermal wall incorporated a heater, and the opposite wall acts as a constant temperature heat source. The major thermal and geometric parameter includes variable wall temperatures, wall surface emissivity, Reynolds number, heat flux and air chosen as the working medium. Due to the wall surface emissivity of the channel, the internal wall surface radiation will significantly change the rate of total heat transfer inside the channel. Therefore, the current research focuses on the mixed convective and surface radiation heat transfer process happening in laminar flow over a horizontal channel. Radiative heat transfer is determined with the help of experimental results and the use of the numerical scheme. The results presented here show the rate of convection heat transfer and the distribution of surface temperature along the walls inside the channel. The flow configuration the channel inside is pictured by passing smoke at the bottom of the entrance section. The quantitative and qualitative results showed that the emissivity of walls and other thermal and geometric parameters significantly affected the overall heat transfer improvement from the square channel.
机译：在该工作中，介绍了混合对流和表面辐射传热研究的相互作用对具有等温垂直壁和绝热顶部和底壁的差动水平通道中的热显影层状气流。侧加热的等温壁掺入加热器，并且相对的壁用作恒温热源。主要的热和几何参数包括可变壁温度，壁面发射率，雷诺数，热量和空气作为工作介质。由于通道的壁表面发射率，内壁表面辐射将显着改变通道内的总热传递速率。因此，目前的研究侧重于水平通道在层流中发生的混合对流和表面辐射传热过程。借助实验结果和数值方案的使用确定辐射热传递。这里提出的结果显示了对流传热和沿着通道内的墙壁的表面温度分布的速率。流量配置通过在入口部分底部传递烟雾来描绘通道内。定量和定性结果表明，墙壁和其他热和几何参数的发射率显着影响了方形通道的整体传热改善。

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