Forces acting on a single introduced particle in a solid-liquid fluidised BEd

Show simple item record Peng, Zhengbiao Ghatage, Swapnil V. Doroodchi, Elham Joshi, Jyeshtharaj B. Evans, Geoffrey M. Moghtaderi, Behdad 2014-06-25T13:23:08Z 2014-06-25T13:23:08Z 2014-09
dc.identifier.citation Peng, Zhengbiao; Ghatage, Swapnil V.; Doroodchi, Elham; Joshi, Jyeshtharaj B.; Evans, Geoffrey M. and Moghtaderi, Behdad, "Forces acting on a single introduced particle in a solid-liquid fluidised BEd", Chemical Engineering Science, DOI: 10.1016/j.ces.2014.04.040, May 2014. en_US
dc.identifier.issn 0009-2509
dc.description.abstract In a liquid fluidised bed system, the motion of each phase is governed by fluid–particle and particle–particle interactions. The particle–particle collisions can significantly affect the motion of individual particles and hence the solid–liquid two phase flow characteristics. In the current work, computational fluid dynamics–discrete element method (CFD–DEM) simulations of a dense foreign particle introduced in a monodispersed solid–liquid fluidised bed (SLFB) have been carried out. The fluidisation hydrodynamics of SLFB, settling behaviour of the foreign particle, fluid–particle interactions, and particle–particle collision behaviour have been investigated. Experiments including particle classification velocity measurements and fluid turbulence characterisation by particle image velocimetry (PIV) were conducted for the validation of prediction results. Compared to those predicted by empirical correlations, the particle classification velocity predicted by CFD–DEM provided the best agreement with the experimental data (less than 10% deviation). The particle collision frequency increased monotonically with the solid fraction. The dimensionless collision frequency obtained by CFD–DEM excellently fit the data line predicted by the kinetic theory for granular flow (KTGF). The particle collision frequency increased with the particle size ratio (dP2/dP1) and became independent of the foreign particle size for high solid fractions when the fluidised particle size was kept constant. The magnitude of collision force was 10–50 times greater than that of gravitational force and maximally 9 times greater than that of drag force. A correlation describing the collision force as a function of bed voidage was developed for Stp>65 and dP2/dP1≤2. A maximum deviation of less than 20% was obtained when the correlation was used for the prediction of particle collision force. en_US
dc.description.statementofresponsibility by Swapnil Vilasrao Ghatage et al.,
dc.format.extent Vol. 116, pp. 49–70
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Classification velocity en_US
dc.subject Collision frequency and collision force en_US
dc.subject Discrete element method en_US
dc.subject Fluidisation en_US
dc.subject Fluid–particle interactions en_US
dc.title Forces acting on a single introduced particle in a solid-liquid fluidised BEd en_US
dc.type Article en_US
dc.relation.journal Chemical Engineering Science

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