Siddhartha Shrestha and Zongyan Zhou*,
Laboratory for Simulation and Modelling of Particulate Systems, Department of Chemical Engineering, Monash University, Victoria 3800, Australia
Bubble dynamics significantly affect the hydrodynamics of gas-solid fluidized bed since they influence the gas-solid mixing. In this study, simulations using CFD-DEM were carried out to characterize the bubble size and shape for a bubble formed at a single orifice in gas-solid fluidized bed. Impact of parameters such as jet velocity, orifice size and particle shape on bubble equivalent diameter and bubble aspect ratio were analysed and discussed. Bubble equivalent diameter was found to increase with increasing jet velocity and orifice size and changing particle shape. The bubble shape illustrated by aspect ratio, was found to elongate more as it rises through the bed and then commence to expand horizontally after it was detached from the orifice. Aspect ratio was found to be closer to a circle for the bubble at higher jet velocity and orifice size and for non-spherical particles.
camera iphone 8 plus apk A CFD DEM study of single bubble formation in gas fluidization of spherical and non-spherical part. | |
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| Science & Technology | Upload TimePublished on 21 Jun 2017 |
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