Enhancement of heat transfer from hot water by co-flowing it with mercury in a mini-channel

The present study is a numerical investigation on the flow and heat transfer in a mini-channel where both hot liquid water and mercury co-flow together in a direct contact manner. Results show that the presence of a high thermal conductivity liquid metal such as mercury enables the hot water to lose...

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Bibliographic Details
Published inInternational communications in heat and mass transfer Vol. 38; no. 8; pp. 1073 - 1079
Main Author Al Omari, S.-A.B.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.10.2011
Elsevier
Subjects
Applied sciences
Channels
Contact
Design. Technologies. Operation analysis. Testing
Electronics
Energy
Energy. Thermal use of fuels
Enhanced heat transfer
Exact sciences and technology
Heat transfer
Hot water
Integrated circuits
Liquid metal
Liquids
Mass transfer
Mercury
Mini-channel
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Theoretical studies. Data and constants. Metering
Thermal conductivity
Mini-channel
Liquid metal
Enhanced heat transfer
Mercury
Pipe flow
Electronic component
Cooling system
Numerical simulation
Cocurrent flow
Miniaturized design
Modeling
Hot water
Heat transfer
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Summary:The present study is a numerical investigation on the flow and heat transfer in a mini-channel where both hot liquid water and mercury co-flow together in a direct contact manner. Results show that the presence of a high thermal conductivity liquid metal such as mercury enables the hot water to lose much more of its initial thermal energy content, than when only water alone flows in the channel. However, too unjustified excessive mercury co-flowing with the hot water can lead to adverse effects in regards to the heat loss from the hot water. The reason behind the enhanced heat transfer between the two liquids is due to the initiation of high temperature gradients sites inside the channel, especially in the region of the interface between the two liquids, in addition to the high thermal conductivity of mercury, as compared to water thermal conductivity. These two effects lead to effective conduction cooling in the transverse direction over the whole length of the channel. These aspects are quantified in this study.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0735-1933
1879-0178
DOI:10.1016/j.icheatmasstransfer.2011.04.026