Heat Transfer Correlation in High Prandtl (High Schmidt) Number Fluid in Votator Type Scraped Surface Heat Exchanger.
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概要
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An experimental investigation to obtain heat transfer correlation in a Votator type scraped surface heat exchanger with two-blades was performed by an electro-chemical method. Measurements were carried by mass transfer under diffusion control in a ferricyanide/ferrocyanide redox electrochemical reaction. The heat transfer correlation was obtained from an analogy of heat and mass transfer. Local heat transfer coefficients on the wall of the outer column of the exchanger was measured by varying the rotational Reynolds number, flow rate of fluid, Prandtl number and equivalent diameter in order to obtain the unity thermal design equation.<BR>The time averaged local Nusselt number in a high Prandtl number fluid was found to be correlated by the following equation:<BR><BR><I>Nu</I> = 1.53<I>Re<SUB>r</SUB></I><SUP>0.51</SUP><I>Pr</I><SUP>0.33</SUP> (<I>D<SUB>o</SUB></I>/<I>D<SUB>e</SUB></I>)<SUP>0.44</SUP><BR> (1320 < <I>Pr</I> < 5810, 2.94 < <I>D<SUB>o</SUB></I>/<I>D<SUB>e</SUB></I> < 7.2)<BR><BR>where <I>Re<SUB>r</SUB></I> and <I>D<SUB>e</SUB></I> are the blade rotational Reynolds number and equivalent diameter respectively.
- The Society of Chemical Engineers, Japanの論文
著者
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MIYASHITA Hisashi
Department of Material Science and Engineering, Toyama University
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Yoshida Masamichi
Department Of Material Science And Engineering Toyama University
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Yamane Takeshi
Department Of Chemistry Faculty Of Education And Human Sciences University Of Yamanashi
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Nishimura Tatsuo
Department of Mechanical Engineering, Yamaguchi University
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Nishimura Tatsuo
Department of Applied Chemistry, Faculty of Engineering, Keio University
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