A combined DEM-CFD examination of regime transitions in gas-fluidised beds

摘要：

The objective of this study is to identify the transitions in fluidised bed behavior as the gas velocity is increased to cover the complete range from minimum fluidization through bubbling and turbulent behavior to pneumatic transport, corresponding to a range of two orders of magnitude in gas velocity. The simulation data are examined in terms of computer visualizations, showing for the first time the evolution of bed structure with changes in gas velocity. The simulated behavior reproduces experimental observations, particularly with respect to the maximum in amplitude of pressure drop fluctuations associated with the transition to turbulence.

关键词： gas-fluidised beds DEM-CFD regime transitions

作者: Fang Yang David K.Kafui Colin Thornton Jonathan P.K.Seville

作者单位: School of Engineering,University of Birmingham Edgbaston,Birmingham B15 2TT,UK

会议类型: 国际会议

会议名称: 国际离散元及非连续介质力学数值模拟研讨会(北京离散元08)(International Symposium RCUK-China Summer School on Discrete Element Methods and Numerical Modelling of Discontinuum Mechanics)(Beijing DEM08)

会议地点: 北京

会议语种:英文

页码: 249-257

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）