Mist cooling of hot metals coated with a thin insulating material

An experimental study was conducted to investigate transient heat transfer of mist (water-air) cooling of hot metals coated with a thin layer of insulating (low thermal conductivity) material. The test specimen selected for the present experiment was a silver disk (30 mm in diameter, and 10 mm thick...

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Bibliographic Details
Published in:Materials in engineering 1994, Vol.15 (5), p.269-274
Main Authors: Kikuchi, Yoshihiro, Min, Jingchun, Yamanaka, Toshiki
Format: Article
Language:English
Subjects:
coating thickness
heat transfer
mist cooling
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Summary:An experimental study was conducted to investigate transient heat transfer of mist (water-air) cooling of hot metals coated with a thin layer of insulating (low thermal conductivity) material. The test specimen selected for the present experiment was a silver disk (30 mm in diameter, and 10 mm thick) whose heat transfer surface was coated with a refractory paint. The mist flow impacted vertically onto the heat transfer surface. The paint coating produced a great enhancement in heat transfer since an earlier transition from film to transition boiling occurred. The minimum heat flux and temperature became higher with increasing coating thickness.
ISSN:0261-3069
DOI:10.1016/0261-3069(94)90073-6