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Research Papers: Micro/Nanoscale Heat Transfer

Constructal Allocation of Nanoparticles in Nanofluids

[+] Author and Article Information
Chao Bai

Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong

Liqiu Wang1

Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Konglqwang@hku.hk

1

Corresponding author.

J. Heat Transfer 132(5), 052404 (Mar 09, 2010) (6 pages) doi:10.1115/1.4000473 History: Received July 08, 2009; Revised September 08, 2009; Published March 09, 2010; Online March 09, 2010

We perform a constructal design of heat conduction in a blade-configured disk-shaped domain with uniform heat generation and periphery heat-sink by introducing a transition line from two-path conduction to one-path conduction in the domain. This orderly arranged blade configuration can offer significantly smaller constructal overall temperature difference than that of the dispersed configuration and thus performs much better. The constructal allocation of nanoparticles inside the base fluids and thus the heat-conduction design inside the nanofluids are very important for better system performance. This work shows that the search for heat-flow configuration is a key to performance, and the constructal theory is the strategy for discovering the configuration and the significantly better performance.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Blade-configured disk-shaped domain

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Figure 2

One circular sector in the disk-shaped domain

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Figure 3

One circular sector in the disk-shaped domain with the approximated transition line

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Figure 4

Comparison between the blade configuration and dispersed configuration at ϕ=0.05

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Figure 5

Comparison between the blade configuration and dispersed configuration at ϕ=0.03

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Figure 6

Comparison between the blade configuration and dispersed configuration at ϕ=0.01

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Figure 7

Comparison between the blade configuration and dispersed configuration at ϕ=0.005

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