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Kato, Yoshihito,Tada, Yutaka,Urano, Kunihiko,Hattori, Masahiro,Nagatsu, Yuichiro,Koh, Song-Tae,Lee, Young-Sei 社団法人 化学工学会 2010 化學工學論文集 Vol.36 No.1
<P>Numerous studies on power consumption in mixing vessels have been reported, and several power correlations have been developed for non-baffled mixing vessels, for example, Nagata's correlations. However, baffled mixing vessels with different impeller geometries have different power numbers. In this paper, the effects of vessel bottom shape, number of blades, and impeller position on power number were measured for several impellers with geometries that had been assumed to have the same power in Nagata's concept. It was found that power numbers in baffled vessels varied greatly with impeller geometry, while Nagata's concept is valid for non-baffled vessels, regardless of impeller position.</P>
Flow visualization and numerical analysis of a new mixing equipment with vibratory fins
Yoshihito Kato,이영세,Setsuro Hiraoka,Shogo Fukumoto,Yutaka Tada,Yuichiro Nagatsu,Ryushin Ohmasa,Sung Tae Koh 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.1
The mixing performance of a new type of mixing equipment which has several fin oscillators on a pair of shafts with a vibrating motor was investigated. This mixing equipment, which is mainly used for industrial plating processes, was usually operated at a vibrating frequency of about 40 Hz with the amplitude 1mm. The flow visualization in this equipment showed that the flow in the vessel at laminar flow region was vertically divided into two distinct symmetric regions. The numerical simulation of the flow and the mixing patterns agreed well with the visualization result at laminar flow region.