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首页> 外文期刊>International Journal of Heat and Mass Transfer >Snowflake shaped high-conductivity inserts for heat transfer enhancement
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Snowflake shaped high-conductivity inserts for heat transfer enhancement

机译：雪花状高导热插件，可增强传热

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摘要

Here, we show numerically how thermal resistance in a two-dimensional domain with a point heat source can be reduced with embedded high-conductivity snowflake shaped pathways. The external shape of the domain is square, and its boundaries are heat sink. The geometry of the inserted pathways which corresponds to the minimum T-max was uncovered with the consideration of Constructal Theory, i.e. the constructal design. In the first assembly, number of mother (big) fins was uncovered as the area fraction increases. The results of the first assembly indicate that the increase in number of mother fins does not increase heat transfer after a limit number for the fins. After uncovering the mother pathway geometry corresponding to the minimum T-max the daughter (small) fins inserted at the tip of them, i.e. second assembly. In the second assembly, the fin ratios, small fin location and angle were discovered when the area fraction is fixed. In addition, in the third assembly, larger daughter fins were attached to mother fins. The results of the second and third assemblies document what should be the geometric length scales and the number of daughter fins in order to minimize T-max. The constructal design uncovered is similar to the shape of snowflakes. Therefore, the results also uncover snowflakes correspond to the designs with minimum thermal conductivity, i.e., not mimicking the nature but understanding it with physics. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在这里，我们通过数值显示了如何通过嵌入的高电导率雪花形路径来降低具有点热源的二维域中的热阻。磁畴的外部形状是正方形，其边界是散热器。考虑到构造理论，即构造设计，发现了对应于最小T-max的插入路径的几何形状。在第一个组件中，随着面积比例的增加，发现了母鳍（大）的数量。第一次组装的结果表明，在限制散热片数量之后，增加母散热片的数量不会增加热传递。在揭露对应于最小T-max的母路径几何形状之后，子鳍（小鳍）插入在它们的尖端，即第二组件。在第二个组件中，面积比固定时，发现了鳍片比例，较小的鳍片位置和角度。此外，在第三次装配中，较大的子鳍与母鳍相连。第二个和第三个装配的结果记录了什么是几何长度标度和子鳍的数量，以使T-max最小。发现的结构设计类似于雪花的形状。因此，结果还揭示了与具有最小热导率的设计相对应的雪花，即，不是模仿自然而是通过物理理解雪花。 （C）2018 Elsevier Ltd.保留所有权利。

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