|The Physical Object|
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Based on the independence of mesh size and time step in the 2-D bed, detailed hydrodynamics are compared numerically in the 2-D and 3-D beds after a sudden change in the liquid inlet velocity and. upward flow of the liquid in liquid-solid systems or with an upward co-current flow of the gas and the liquid in gas-liquid-solid systems. Under these fluidization conditions, a bed of particles with a density higher than that of the liquid is fluidized with an upward flow of the . Hydrodynamics of Circulating Fluidized Beds: Kinetic Theory Approach Hydrodynamics of Circulating Fluidized Beds: Kinetic Theory Approach. Gidaspow, D. / Bezbaruah, R. / Ding, J. | Circulation of Liquid-Fluidised Particles at Liquid Velocities Higher Than the Terminal Velocity. Tanaka. This book provides a comprehensive mechanistic interpretation of the transport phenomena involved in various basic modes of gas-liquid-solid fluidization. These modes include, for example, those for three-phase fluidized beds, slurry columns, turbulent contact absorbers, and three-phase fluidized beds, slurry columns, turbulent contact.
velocity was more on liquid holdup and the bed expands with the increasing liquid flow rates. From the fig 7 and 9, for beds of particle size mm and mm, the liquid holdup was more than that obtained by increasing the gas flow rate.. The liquid velocity plays more predominant role in liquid Size: KB. 1. Introduction. Nowadays, gas-fluidised beds find a widespread application in the petroleum, chemical, metallurgical and energy industries. The objective of much fluidisation research has been the prediction of the performance of industrial beds,,.Despite significant efforts, the complex hydrodynamics of these systems is still not fully by: However, the hydrodynamics of such fluidized beds, using normally low-grade feedstocks, is very complex and plays a critical role for successful operation of the plant. Lots of experimental and theoretical investigations are done in this area; however, the Author: Malay K. Karmakar, Chanchal Loha, Santanu De, Pradip K. Chatterjee. The prediction of the hydrodynamics in fluidized beds of heterogeneous particles is of fundamental importance in designing the equipments and in evaluating the efficiency of physical and/or chemical operations, e.g. the gasification and combustion of coal, catalytic reactions, drying, coating and granulation, mixing, etc.
To design an industrial liquid solid circulating fluidized bed system properly, it is important that the hydrodynamics be studied first. So far investigations have been carried out in a liquid solid circulating fluidized bed (LSCFB) with tap water as the liquid phase. There is still limited understanding on how particles are circulated in LSCFB with viscous : G. S. Nirmala, L. Muruganandam. In this work, we employed a computational fluid dynamics (CFD)-based model with a Eulerian multiphase approach to simulate the fluidization hydrodynamics in biomass gasification processes. Air was used as the gasifying/fluidizing agent and entered the gasifier at the bottom which subsequently fluidized the solid particles inside the reactor column. The momentum exchange related to the gas Author: Ramin Khezri, Wan Azlina Wan Ab Karim Ghani, Salman Masoudi Soltani, Dayang Radiah Awang Biak, Robia. Bed height and material density effects on fluidized bed hydrodynamics by David Escudero Guevara A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Major: Biorenewable Resources and Technology Program of Study Committee: Theodore J. Heindel, Major Professor Michael OlsenCited by: Hydrodynamics and Heat Transfer in Fluidized Beds Hardcover – Septem by S. S. Zabrodsky (Author) See all formats and editions Hide other formats and editions. Price New from Used from Hardcover "Please retry" Author: S. S. Zabrodsky.