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A simplified two-fluid model coupled with EMMS drag for gas-solid flows
Qiu, Xiaoping1,2; Wang, Limin1; Yang, Ning1; Li, Jinghai1
2017-06-01
发表期刊POWDER TECHNOLOGY
ISSN0032-5910
卷号314期号:JUN页码:299-314
摘要

A simplified two-fluid model (STFM) combined with energy-minimization multi-scale (EMMS) drag was proposed for accurate and fast simulation of gas-solid flows. In the proposed approach, the solid phase viscosity is neglected, the solid phase pressure is calculated with an empirical formulation, and the interphase momentum transfer is modeled with EMMS drag, which takes the effects of meso-scale structures into consideration. Three typical fluidization cases, namely, a 2D circulating fluidized bed, a 3D lab-scale bubbling fluidized bed, and a 3D lab-scale full-loop circulating fluidized bed, were successfully simulated with this approach. The numerical results are compared with those of full two-fluid model (FTFM, i.e., the two-fluid model using the kinetic theory for granular flow to close solid phase stress term), as well as experimental data. Predictions of STFM coupled with EMMS drag are comparable with those of FTFM coupled with EMMS drag, and both agree well with experimental data. However, computational cost of STFM is significantly reduced compared with that of FTFM. It is suggested that drag model has a dominant effect on gas-solid simulation, and the effect of solid phase stress term seems to play a minor role, demonstrating the feasibility and practicality of STFM with EMMS drag for describing the hydrodynamics of heterogeneous gas-solid flows. (C) 2016 Elsevier B.V. All rights reserved.

关键词Emms Drag Two-fluid Model Gas-solid Flow Computational Fluid Dynamics Fluidization Multiphase Flow
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.powtec.2016.09.002
收录类别SCI ; ISTP
语种英语
关键词[WOS]CIRCULATING FLUIDIZED-BED ; PARTICLE-PARTICLE INTERACTIONS ; MULTISCALE CFD APPROACH ; FULL-LOOP SIMULATION ; GRANULAR FLOW ; NUMERICAL-SIMULATION ; KINETIC-THEORY ; CONSTITUTIVE RELATIONS ; MESOSCALE STRUCTURES ; EULERIAN SIMULATION
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(91434113 ; National Key Basic Research Program of China(2015CB251402) ; Chinese Academy of Sciences(QYZDB-SSW-SYS029 ; 21106155) ; CXJJ-14-Z72 ; XDA07080303)
WOS记录号WOS:000401880700029
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22522
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Qiu, Xiaoping,Wang, Limin,Yang, Ning,et al. A simplified two-fluid model coupled with EMMS drag for gas-solid flows[J]. POWDER TECHNOLOGY,2017,314(JUN):299-314.
APA Qiu, Xiaoping,Wang, Limin,Yang, Ning,&Li, Jinghai.(2017).A simplified two-fluid model coupled with EMMS drag for gas-solid flows.POWDER TECHNOLOGY,314(JUN),299-314.
MLA Qiu, Xiaoping,et al."A simplified two-fluid model coupled with EMMS drag for gas-solid flows".POWDER TECHNOLOGY 314.JUN(2017):299-314.
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