Large Particle Movement and Drag Coefficient in a Fluidized Bed

Autor:	Akira Tsuruno, Mamoru Ozawa, Hisashi Umekawa, Nobuyuki Takenaka, Takeshi Matsuda, Masahito Matsubayashi
Rok vydání:	1996
Předmět:	Physics Flow visualization Drag coefficient Mechanical Engineering Bubble Mechanics Wake Condensed Matter Physics Physics::Fluid Dynamics Classical mechanics Fluidized bed Drag Parasitic drag Particle
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 62:3413-3420
ISSN:	1884-8346 0387-5016
DOI:	10.1299/kikaib.62.3413
Popis:	Flow visualization of the behavior of a large particle in a fluidized bed was conducted using neutron radiography. The large particle moved according to the bed materials, especially in the wake of a bubble. When the density of the large particle was high, the particle moved with a velocity different from that of bubble, and in some cases the particle moved downward through a bubble. When the density was low enough, the particle moved on the surface of the bubble wake. The drag force of the large particle immersed in the fluidized bed was measured. The drag force increased with increase in the volumetric gas flux as well as with increase in the particle diameter. The drag coefficient was derived and was well correlated on the basis of a two-phase model and experimentally determined effective viscosity of the bed materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ce9d7c28338035a5ae12b6d1b446df2e https://doi.org/10.1299/kikaib.62.3413 Zobrazit plný text záznamu