Effects of Hydrophobic-Spot Periphery and Subcooling on Nucleate Pool Boiling from a Mixed-Wettability Surface
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概要
- 論文の詳細を見る
The effect of subcooling and length of hydrophobic-spot periphery on nucleate pool boiling heat transfer from TiO<SUB>2</SUB>-coated surface with and without PTFE (polyetatafluoroethylene) hydrophobic circle spots at intermediate heat flux has been examined. The experiments are performed with liquid subcooling ranging from 0-20 K and heat transfer block used were TiO<SUB>2</SUB>-coated copper block with a PTFE hydrophobic circle spot with various diameters with total area of PTFE being constant. Bubble nucleation and behavior were observed by using high-speed camera. The results showed that the heat transfer performance of surfaces with PTFE hydrophobic circle spot is better than superhydrophilic surface in overall condition. Furthermore, the heat transfer performance decreases under subcooled condition for all surfaces. Increase in peripheral length of hydrophobic-spot enhances the heat transfer performance.
- 一般社団法人日本機械学会・社団法人日本伝熱学会の論文
著者
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Tashiro Masahiro
Department of Cardiology, Himeji Cardiovascular Center
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Takata Yasuyuki
Department Of Mechanical Engineering For Power Faculty Of Engineering Kyushu University
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Kohno Masamichi
Department Of Mechanical Engineering Kyushu University
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HIDAKA Sumitomo
Department of Mechanical Engineering, Kyushu University
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SUROTO Bambang
Department of Mechanical Engineering, Kyushu University
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HIRABAYASHI Sana
Department of Mechanical Engineering, Kyushu University
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TASHIRO Masahiro
Department of Mechanical Engineering, Kyushu University
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