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首页> 外文期刊>Journal of enhanced heat transfer >ENHANCED HEAT TRANSFER OF Cu-WATER NANOFLUID IN A CHANNEL WITH WALL MOUNTED BLUNT RIBS
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ENHANCED HEAT TRANSFER OF Cu-WATER NANOFLUID IN A CHANNEL WITH WALL MOUNTED BLUNT RIBS

机译：增强壁挂式钝肋通道中Cu水纳米流体的传热

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摘要

A numerical study on the heat transfer characteristics of the Cu-water nanofluid within a heated patterned channel is made. One wall of the channel is patterned by placing surface mounted blunt ribs. The objective of this study is to analyze enhanced heat transfer performance in a thin channel by using nanofluid as a cooling fluid combined with geometric modulation of the channel walls. The flow and thermal field are analyzed for a wide range of Reynolds number, based on the incoming flow and channel height, and nanoparticle volume fraction. The heat transfer performance is studied by evaluating the rate of heat transfer, entropy generation, pressure drop, and thermal performance factor. A single-phase model is adopted to analyze the nanofluid flow and heat transfer. Increase in nanoparticle volume fraction produces an increment in heat transfer as well as entropy generation. The wall mounted protrusion creates a flow separation and the recirculation eddy downstream of the protrusion grows with the increase of the nanoparticle volume fraction. The present study shows that a multiple number of ribs creates an enhanced heat transfer with reduced thermal performance compared to a single rib. An increase in nanoparticle volume fraction increases the thermal performance.
机译：制造了加热图案通道内Cu水纳米流体的传热特性的数值研究。通过放置表面安装的钝肋来图案化通道的一壁。本研究的目的是通过使用纳米流体作为冷却流体与通道壁的几何调制结合的纳米流体来分析薄通道中的增强的传热性能。基于进入的流动和通道高度，纳米颗粒体积分数，分析流动和热场段的各种雷诺数。通过评估传热，熵产生，压降和热性能因子来研究传热性能。采用单相模型来分析纳米流体流动和热转印。纳米颗粒体积级分的增加在热转印和熵产生中产生增量。壁挂式突起产生流动分离，突起下游的再循环涡流随着纳米颗粒体积分数的增加而生长。本研究表明，与单个肋相比，多个数量的肋条产生具有降低的热性能的增强的热传递。纳米颗粒体积分数的增加增加了热性能。

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