Modeling bubble heat transfer in gas-solid fluidized beds using DEM

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• 作者：Amit V. Patil ; E.A.J.F. Peters ; T. Kolkman ; J.A.M. Kuipers
• 关键词：Fluidized beds ; Discrete Element Method ; Heat transfer coefficient ; Davidson and Harrison bubble model
• 刊名：Chemical Engineering Science
• 出版年：24 February, 2014
• 年：2014
• 卷：105
• 期：Complete
• 页码：121-131
• 全文大小：3711 K

文摘

Discrete element method (DEM) simulations of a pseudo 2-D fluidized bed at non-isothermal conditions are presented. First implementation details are discussed. This is followed by a validation study where heating of a packed column by a flow of heated fluid is considered. Next hot gas injected into a colder bed that is slightly above minimum fluidization conditions is modeled. In this study bubbles formed in monodisperse beds of different glass particle sizes (1 mm, 2 mm and 3 mm) and with a range of injection temperatures (300-900 K) are analyzed. Bubble heat transfer coefficients in fluidized beds are reported and compared with values produced by the Davidson and Harrison model.