FLOW IN THE ANNULUS OF A WATER SPOUTED BED OF SMALL GLASS PARTICLES AT MINIMUM SPOUTING

The flow in the annulus of a water spouted bed of small glass particles 0.574mm and 0.964mm in diameter is studied in a cylindrical half-column 90 mm in diameter. An axisymmetric model of flow, which assumes Darcy flow in the annulus and uses the experimental spoutannulus interfacial boundary condit...

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Bibliographic Details
Published inJOURNAL OF CHEMICAL ENGINEERING OF JAPAN Vol. 19; no. 4; pp. 319 - 325
Main Authors KIM, SEUNG JAI, HA, JOON Ho
Format Journal Article
LanguageEnglish
Published Tokyo The Society of Chemical Engineers, Japan 1986
Society of Chemical Engineers
Taylor & Francis Group
Subjects
Applied sciences
Axisymmetric Model
Chemical engineering
Cylindrical Half Column
Darcy Flow
Exact sciences and technology
Fluidization
Minimum Spouting
Residence Time
Small Particles
Water
Minimum velocity
Fine particle
Hydrodynamics
Fluidization
Spouted bed
Experimental study
Mathematical model
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Summary:The flow in the annulus of a water spouted bed of small glass particles 0.574mm and 0.964mm in diameter is studied in a cylindrical half-column 90 mm in diameter. An axisymmetric model of flow, which assumes Darcy flow in the annulus and uses the experimental spoutannulus interfacial boundary condition, predicts the annulus fluid streamlines of fine particle beds well. The model calculations show that the average fluid velocity at the top of the annulus decreases as particle size and bed height decrease and the fluid residence time distribution in the annulus is broad. Particles are observed entering the spout primarily near the spout inlet in agreement with the predicted axial voidage profile in the spout.
ISSN:0021-9592
1881-1299
DOI:10.1252/jcej.19.319