Modeling 3D Bubble Heat Transfer in Gas鈥揝olid Fluidized Beds Using the CFD-DEM

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• 作者：A. V. Patil ; E. A. J. F. Peters ; Y. M. Lau ; J. A. M. Kuipers
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：November 18, 2015
• 年：2015
• 卷：54
• 期：45
• 页码：11466-11474
• 全文大小：544K
• ISSN：1520-5045

文摘

Computational fluid dynamics discrete element method simulations of a 3D fluidized bed at nonisothermal conditions are presented. Hot gas injection into a colder bed that is slightly above minimum fluidization conditions is modeled in a 3D square bed containing up to 8 million particles. In this study, bubbles formed in monodisperse beds of different glass particle sizes (0.25, 0.5, 0.75, and 1 mm) and using hot-gas-injection temperatures ranging from 700 to 1100 K are analyzed. Bubble heat-transfer coefficients in 3D fluidized beds are reported and compared with theoretical predictions on the basis of the Davidson and Harrison model.