FILTERED SUB-GRID MODIFICATIONS FOR GAS-SOLID DRAG AND SOLID STRESSES IN FLUIDIZED BEDS

摘要：

　　The constitutive relations for the filtered gas-solid drag and the filtered particle phase stresses presented in our previous study (Schneiderbauer and Pirker, 2014) are verified on the one hand, in the case of a lab-scale bubbling fluidized bed using 150μm glass beads and on the other hand, in the case of an industrial scale turbulent fluidized bed using 240μm sand grains.The results show that these sub-grid modifications, i.e.these relations account for the unresolved contributions when using coarse grids, are able to predict the bed expansion and the axial profiles of the time averaged solids inventory as well as the bubble rise velocities correctly.Thus, these constitutive are proven to be applicable to different particle diameters and different fluidization regimes.

作者: Simon Schneiderbauer Stefan Pirker

作者单位: Department of Particulate Flow Modelling,Johannes Kepler University,4040 Linz,Austria;CD-Laboratory for Particulate Flow Modelling,Johannes Kepler University,4040 Linz,Austria

会议类型: 国际会议

会议名称: The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)

会议地点: 北京

会议语种:英文

页码: 305-310

在线出版日期: 2014-05-14（万方平台首次上网日期，不代表论文的发表时间）