Fluidization science, its development and future--颗粒学报PARTICUOLOGY

Department of Politics, Ryukoku University, RISTEX, Japan Science and Technology Agency, Kojimachi Square 5F, 3 Niban-cho, Chiyoda-ku, Tokyo 102-0084, Japan

10.1016/j.partic.2010.08.010

Volume 8, Issue 6, December 2010, Pages 514-524

Received 22 June 2010, Accepted 31 August 2010, Available online 9 November 2010.

E-mail: myhorio06@ca.wakwak.com

Highlights

Abstract

By revisiting the three stage theory for the progress of science proposed by Taketani in 1942, the footmarks of fluidization research are examined. The bubbling and fast fluidization issues were emphasized so that the future of fluidization research can be discussed among scientists and engineers in a wider perspective. The first cycle of fluidization research was started in the early 1940s by an initial stage of phenomenology. The second stage of structural studies was kicked off in the early 1950s with the introduction of the two phase theory. The third stage of essential studies occurred in the early 1960s in the form of bubble hydrodynamics. The second cycle, which confirmed the aforementioned three stages closed at the turn of the century, established a general understanding of suspension structures including agglomerating fluidization, bubbling, turbulent and fast fluidizations and pneumatic transport; also established powerful measurement and numerical simulation tools.After a general remark on science, technology and society issues the interactions between fluidization technology and science are revisited. Our future directions are discussed including the tasks in the third cycle, particularly in its phenomenology stage where strong motivation and intention are always necessary, in relation also to the green reforming of the present technology. A generalized definition of ‘fluidization’ is proposed to extend fluidization principle into much wider scientific fields, which would be effective also for wider collaborations.

Graphical abstract

Keywords

Historical development of fluidization; Science and society; Taketani's three step law; Paradigm shift; Fluid catalytic cracking; Phase transition; Bubbling bed; Fast fluidization; Cluster; Future direction

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