Pool boiling characteristics of low concentration nanofluids |
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| Authors: | Sang M Kwark Ratan Kumar Gilberto Moreno Jaisuk Yoo Seung M You |
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| Affiliation: | 1. Mechanical and Aerospace Engineering Department, The University of Texas at Arlington, 500 W. First St., Arlington, TX 76019, United States;2. Mechanical Engineering Department, Ajou University, Suwon, Republic of Korea;1. School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, PO Box 71, Bundoora, VIC 3083, Australia;2. Key Laboratory of Ministry of Education for Advanced Reactor Engineering and Safety, Institute of Nuclear and New Energy Technology, Tsinghua University, PO Box 1021, Beijing 100086, China;1. Division of Mechanical System Engineering, Incheon National University, Republic of Korea;2. Division of Advanced Nuclear Engineering, POSTECH, Republic of Korea;1. Institute of Thermal Science and Power Systems, School of Energy Engineering, Zhejiang University, Hangzhou 310027, People''s Republic of China;2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, People''s Republic of China |
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| Abstract: | The pool boiling behavior of low concentration nanofluids (?1 g/l) was experimentally studied over a flat heater at 1 atm. Boiling of nanofluids produces a thin nanoparticle film, on the heater surface, which in turn is believed to increase the critical heat flux. The present study also indicates that the nanoparticle deposition results in transient characteristics in the nucleate boiling heat transfer. Finally, this study investigates possible causes responsible for the deposition of nanoparticle on the heater surface. Experimental evidence shows that microlayer evaporation, during nanofluid boiling, is responsible for the nanoparticle coating formed on the heater surfaces. |
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