CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients

doi:10.1016/j.cej.2020.127503

	CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients
	Hu, Shanwei 1; Liu, Xinhua 1,2
刊名	CHEMICAL ENGINEERING JOURNAL
	2021-06-01
卷号	413 页码:11
关键词	Gas bubble Gas-solid fluidization Coarse-grid simulation Population balance model EMMS Interphase drag force
ISSN号	1385-8947
DOI	10.1016/j.cej.2020.127503
英文摘要	Bubble size distribution resulted from bubble coalescence and breakup has significant effects on the effective interphase drag in gas?solid bubbling fluidized beds, which was however not taken into account in previous coarse-grid simulations. In this study, the population balance model (PBM) was used to describe the dynamic evolution of gas bubbles in gas?solid bubbling fluidization, wherein the coalescence and breakup kernels were derived by considering the effects of bubble velocity difference, wake capture and bubble instability. An improved energy-minimization multi-scale (EMMS) bubbling model was developed to calculate the effective interphase drag in sub-grid scale. By incorporating both the PBM and the EMMS drag into an Eulerian continuum model, a CFD-PBM-EMMS coupled scheme was further proposed to predict the hydrodynamics of bubbling fluidized beds. The scheme was validated through comparison of simulated results with experimental data. The bed expansion characteristics and the lateral profiles of solids velocities were reasonably predicted at acceptable computational cost. Satisfactory agreement was also achieved between the measured and simulated bubble size distributions. The proposed sub-grid drag model and coupled simulation scheme can facilitate capturing the salient features of the hydrodynamics of gas?solid bubbling fluidized beds.
资助项目	"Transformational Technologies for Clean Energy and Demonstration", Strategic Priority Research Program of the Chinese Academy of Sciences[XDA21040400] ; National Natural Science Foundation of China[22008240]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000638237900001
资助机构	"Transformational Technologies for Clean Energy and Demonstration", Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/48442]
专题	中国科学院过程工程研究所
通讯作者	Liu, Xinhua
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Hu, Shanwei,Liu, Xinhua. CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients[J]. CHEMICAL ENGINEERING JOURNAL,2021,413:11.
APA	Hu, Shanwei,&Liu, Xinhua.(2021).CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients.CHEMICAL ENGINEERING JOURNAL,413,11.
MLA	Hu, Shanwei,et al."CFD-PBM simulation of gas?solid bubbling flow with structure-dependent drag coefficients".CHEMICAL ENGINEERING JOURNAL 413(2021):11.