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首页> 外文期刊>Numerical Heat Transfer, Part A. Application: An International Journal of Computation and Methodology >CONJUGATE HEAT TRANSFER AND BUOYANCY-DRIVEN SECONDARY FLOW IN THE COOLING CHANNELS WITHIN A VERTICAL SLAB
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CONJUGATE HEAT TRANSFER AND BUOYANCY-DRIVEN SECONDARY FLOW IN THE COOLING CHANNELS WITHIN A VERTICAL SLAB

机译：垂直板内冷却通道中的共轭传热和浮力驱动的二次流

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摘要

The present study is concerned with buoyancy-induced secondary flow and heat transfer characteristics in a series of circular cooling channels within a vertical slab. The fully developed flows, in which the transverse thermal energy diffusion plays a dominant role in the overall heat transfer behavior, are analyzed numerically. Thermal energy transmits transversely from the hotter end surface to the colder end surface across the slab through a domain containing a solid region and a fluid region occupied by the cooling channels. The stream function-vorticity formulation and the finite volume method coupled with a body-fitted coordinate transformation scheme are employed to analyze this conjugate heat transfer problem. Results show that when the Grashof number is higher than approximately 10(3), the strength of the secondary flow becomes appreciable and results in a significant increase in overall heat transfer rate. In this study a maximum 120% increase in heat transfer rate, but only 12% increase in friction factor, is found within the parameter ranges considered. [References: 13]
机译：本研究涉及浮力引起的二次流动和传热特性，这些传热特性是在竖直平板内的一系列圆形冷却通道中产生的。数值分析了充分发展的流动，其中横向热能扩散在整个传热行为中起主要作用。热能通过包含由冷却通道占据的固体区域和流体区域的区域，从较热的端面横向地跨过板传递至较冷的端面。采用流函数涡度公式化和有限体积法结合拟合坐标变换方案来分析该共轭传热问题。结果表明，当Grashof数大于约10（3）时，二次流的强度变得可观，并导致总传热率显着提高。在本研究中，在所考虑的参数范围内发现最大传热速率增加了120％，而摩擦系数仅增加了12％。 [参考：13]

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