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research-article

Experimental measurements and numerical computation of nano heat transfer enhancement inside a porous material

[+] Author and Article Information
Ziad Saghir

Ryerson University, Mechanical and Industrial Engineering Department, Toronto, ON, Canada, M5B 2K3
zsaghir@ryerson.ca

Christopher Welsford

Ryerson University, Mechanical and Industrial Engineering Department, Toronto, ON, Canada, M5B 2K3
christopher.welsford@ryerson.ca

Pirassanth Thanapathy

Ryerson University, Mechanical and Industrial Engineering Department, Toronto, ON, Canada, M5B 2K3
pthanapathy@ryerson.ca

Ayman, A.M. Bayomy

Ryerson University, Mechanical and Industrial Engineering Department, Toronto, ON, Canada, M5B 2K3
ayman.bayomy@ryerson.ca

Cayley Delisle

Ryerson University, Mechanical and Industrial Engineering Department, Toronto, ON, Canada, M5B 2K3
cayley.delisle@ryerson.ca

1Corresponding author.

ASME doi:10.1115/1.4041936 History: Received September 03, 2018; Revised November 05, 2018

Abstract

The rapid rate of improvement in electronic devices has led to an increased demand for effective cooling techniques. The purpose of this study is to investigate the heat transfer characteristics of an aluminum metallic foam for use with an Intel core i7 processor. The metal foams used have a porosity of 0.91 and different permeabilities ranging from 10 PPI to 40 PPI. The flow rate at the entrance of the porous cavity varied from 0.22 USGPM to 0.1 USGPM. The fluid consists of water with aluminum nanoparticles having a concentration from 0.1% to 0.5%. The heat fluxes applied at the bottom of the porous test cell vary from 13.25 W/cm2 to 8.34 W/cm2. It has been observed that nanofluid improves heat extraction, it is a known fact that when a metallic porous material is circulated with the working fluid. It adds to the heat extraction rate and the combined effect of the flow rate. These observations lead to the conclusion that heat enhancement is possible with nanofluid and it is enhanced further in the presence of a high flow rate. However, it was detected experimentally, verified numerically and agreed upon by different researchers that higher heat extraction is found for a nanofluid concentration of 0.2%. This observation is independent of the porous permeability or applied heat flux. It has also been shown that heat enhancement in the presence of nanofluid is evident, when experimental results were compared to water.

Copyright (c) 2018 by ASME
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