期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 178, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2021.121621
关键词
Fluidized bed; Immersed surface; Computational particle fluid dynamic; Hydrodynamics; Local heat transfer coefficient
This study presents a 2-D numerical simulation of a freely bubbling fluidized bed with immersed surfaces using the CPF D model, showing different heat transfer mechanisms depending on the immersed surface geometries. The results indicate that CPFD-Barracuda is able to properly simulate heat transfer and bed dynamics, especially in defluidized regions where the two-fluid model fails.
This paper presents a 2-D numerical simulation of a freely bubbling fluidized bed with immersed surfaces, using the Computational Particle Fluid Dynamics (CPF D ) model implemented in the Barracuda commercial software. The heat transfer coefficients obtained are compared with an experimental study available in the open literature and numerical simulations based on the two-fluid model approach performed by other authors. Two different immersed surfaces, representing spherical and cylindrical geometries were studied. The simulations results show different heat transfer mechanisms, depending on the angular position in the two immersed surface geometries studied. The time average heat transfer coefficient around the whole heat transfer surface were 25 % and 38 % lower than the experimental study, for the cylindrical and spherical surfaces, respectively. These differences are lower than the results obtained with the two fluid model approach reported in the open literature. The numerical results indicate that CPFD-Barracuda is able to properly simulate the heat transfer and the dynamics of the bed in defluidized regions, such as on the top of an immersed surface, where the two-fluid model fails and overpredicts the heat transfer rate. (c) 2021 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据