Unification of particle velocity distribution functions in gas-solid flow

doi:10.1016/j.ces.2017.11.047

	Unification of particle velocity distribution functions in gas-solid flow
	Zhao, Bidan 1,2; Wang, Junwu1
	2018-02-23
发表期刊	CHEMICAL ENGINEERING SCIENCE
ISSN	0009-2509
卷号	177 页码:333-339
摘要	Continuum models have been extensively used in CFD simulation of gas-solid flow, which is usually closed with a kinetic theory of granular flow for particulate phase stresses and a correlation for interphase drag force. Particle velocity distribution function (PVDF) is the cornerstone of kinetic theory of granular flow and the PVDFs in gas-solid flow can be Maxwellian, bimodal and/ or non-Maxwellian with an overpopulated high-energy tail, depending on the physical nature of gas-solid flow. Here we theoretically show that the different PVDFs can be unified under the umbrella of a recently proposed kinetic theory framework (Wang et al., 2016) and the root of different PVDFs lies in the different characteristics of mesoscale structures. Validation of theoretical analysis is then carried out by comparing the theoretical prediction with experimental and DNS data available in literature. The findings of present study offer a possibility of developing a unified kinetic theory for gas-solid flows. (C) 2017 Elsevier Ltd. All rights reserved.
关键词	Fluidization Gas-solid Flow Kinetic Theory Granular Flow Clustering Structure Particle Velocity Distribution Function
文章类型	Article
WOS标题词	Science & Technology ; Technology
DOI	10.1016/j.ces.2017.11.047
收录类别	SCI
语种	英语
关键词[WOS]	FILTERED 2-FLUID MODELS ; FLUIDIZED-BEDS ; KINETIC-THEORY ; NUMERICAL-SIMULATION ; EULERIAN SIMULATION ; GRANULAR FLOW ; CFB RISERS ; SUSPENSION ; EQUATIONS ; PARADIGM
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
项目资助者	National Natural Science Foundation of China(21422608) ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences(QYZDJ-SSW-JSC029)
WOS记录号	WOS:000425918100027
引用统计
文献类型	期刊论文
条目标识符	http://ir.ipe.ac.cn/handle/122111/24002
专题	多相复杂系统国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Bidan,Wang, Junwu. Unification of particle velocity distribution functions in gas-solid flow[J]. CHEMICAL ENGINEERING SCIENCE,2018,177:333-339.
APA	Zhao, Bidan,&Wang, Junwu.(2018).Unification of particle velocity distribution functions in gas-solid flow.CHEMICAL ENGINEERING SCIENCE,177,333-339.
MLA	Zhao, Bidan,et al."Unification of particle velocity distribution functions in gas-solid flow".CHEMICAL ENGINEERING SCIENCE 177(2018):333-339.