Stable and uniform heat dissipation by nucleate-catalytic nanowires for boiling heat transfer

Boiling-favorable merits of nanowire arrays are discussed for the thermal stability of boiling heat transfer. Local and temporal heat transfer characteristics are evaluated on vertically aligned nanowire arrays using a devised temperature-array sensor. The effects of rough morphology and highly wett...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2014-03, Vol.70, p.23-32
Main Authors: Kim, Beom Seok, Shin, Sangwoo, Lee, Donghwi, Choi, Geehong, Lee, Hwanseong, Kim, Kyung Min, Cho, Hyung Hee
Format: Article
Language:English
Subjects:
Arrays
Boiling
Boiling heat transfer
Bubbles
Capillary pumping
Cooling
Cooling technology
Heat transfer
Heat transfer uniformity
Nanostructure
Nanowires
Nucleation
Nucleation dynamics
Silicon nanowires
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Summary:Boiling-favorable merits of nanowire arrays are discussed for the thermal stability of boiling heat transfer. Local and temporal heat transfer characteristics are evaluated on vertically aligned nanowire arrays using a devised temperature-array sensor. The effects of rough morphology and highly wetting characteristics of nanowires lead to the reliable heat transfer stability/uniformity as well as efficient heat dissipation performances in pool boiling environments. The easy re-wetting and by-productive cavity-like structures via long nanowires can stabilize nucleation dynamics that catalyzes bubble nucleation dispersely and detaches developed bubbles quickly. Nanowires-inspired boiling heat transfer can make a breakthrough in improvements of heat transfer uniformity/stability with spatial and temporal temperature variations less than 1.0 and 2.0K, respectively. SiNWs can also guarantee enhancements of both heat dissipation capacity and efficiency by more than 100% compared to a plain surface.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2013.10.061