Empirical correlation for performance evaluation of electric/corona wind on natural convection |
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| Institution: | 1. Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran;2. Department of Mechanical Engineering, University of Tabriz, Tabriz, Iran;3. Department of Energy Systems Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;1. Laboratory of Phytoprotection Science and Technology, Faculty of Agriculture, Kinki University, Nara 631-8505, Japan;2. Pharmaceutical Research and Technology Institute, Kinki University, Osaka 577-8502, Japan;3. Research and Development Division, Kagome Co., Ltd., Tochigi 329-2762, Japan;4. Technical Development Unit, Panasonic Environmental Systems & Engineering Co., Ltd., Osaka 564-0062, Japan;5. Agricultural, Food and Environmental Sciences Research Center of Osaka Prefecture, Osaka 583-0862, Japan;1. Young Researchers and Elite Club, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran;2. Esfarayen University, Engineering and Technical College, Mechanical Engineering Department, Esfarayen North Khorasan, Iran;3. Department of Mechanical Engineering, Yazd University, Yazd, Iran;4. Department of Mechanical Engineering, Babol University of Technology, Babol, Iran;1. Bioactive Resources for Innovative Clinical Applications Research Unit and Department of Pharmacy Practice, Faculty of Pharmaceutical Sciences, Chulalongkorn University, PhayaThai Road, Phatumwan, Bangkok 10330, Thailand;2. Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, PhayaThai Road, Phatumwan, Bangkok 10330, Thailand;1. Electrical Engineering Laboratory, 8 May 1945 University, Guelma 24000, Algeria;2. PPRIME Institute, UPR 3346, CNRS University of Poitiers – ENSMA, IUT d''Angoulême, 4 Av. de Varsovie, 16021 Angoulême, France |
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| Abstract: | The effect of the corona wind on the natural convection at a rectangular channel was investigated experimentally. The results indicate that the natural convection in the absence of electric/corona wind at obtuse angles outperforms than acute angles and keeps improving by increasing the angle. However, the efficiency of the electric/corona wind at acute angles is higher than obtuse angles. Generally, in the presence of electric/corona wind, heat transfer coefficient was increased. The effect of the electric/corona wind was decreased by raising heat flux. This mainly stems from the fact that the temperature gradient raises the thermal boundary layer and reduces the secondary flow power. Eventually, empirical correlation for the estimation of Nusselt number was achieved. |
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| Keywords: | Natural convection Heat transfer Electrohydrodynamic field Empirical correlation Efficiency |
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