CAS OpenIR  > 多相复杂系统国家重点实验室
Meso-scale statistical properties of gas-solid flowa direct numerical simulation (DNS) study
Liu, Xiaowen1,2; Wang, Limin1; Ge, Wei1
2017
Source PublicationAICHE JOURNAL
ISSN0001-1541
Volume63Issue:1Pages:3-14
Abstract

Statistical properties of particles in heterogeneous gas-solid flow were numerically investigated based on the results of a three-dimensional large-scale direct numerical simulation (DNS). Strong scale-dependence and local non-equilibrium of these properties, especially the particle fluctuating velocity (PFV) or granular temperature, were observed to be related to the effect of meso-scale structures formed by the compromise in competition between fluid and particle dominated mechanisms. To quantify such effects, the heterogeneous structures were partitioned into a gas-rich dilute phase and a solid-rich dense phase according to the particle-scale voidage defined through the Voronoi tessellation. Non-equilibrium features, such as the deviation of PFV from Gaussian distribution and anisotropy, were found even in phase-specific properties. A new distribution function for the PFV well characterizing these features was obtained by fitting the DNS results, which takes a typical bi-disperse mode, with phase-specific granular temperatures. The implications of these findings to the kinetic theory of granular flow and traditional continuum models of gas-solid flow were also discussed. (c) 2016 American Institute of Chemical Engineers AIChE J, 63: 3-14, 2017

KeywordDirect Numerical Simulation Meso-scale Structure Statistical Analysis Gas-solid Flow Fluidization
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1002/aic.15489
Indexed BySCI
Language英语
WOS KeywordCirculating Fluidized-bed ; Discrete Particle Simulation ; Structure-dependent Drag ; Velocity Fluctuations ; Granular Assemblies ; Kinetic-theory ; Slip Velocity ; Cfb Riser ; Systems ; Dynamics
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000390272500002
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21858
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Xiaowen,Wang, Limin,Ge, Wei. Meso-scale statistical properties of gas-solid flowa direct numerical simulation (DNS) study[J]. AICHE JOURNAL,2017,63(1):3-14.
APA Liu, Xiaowen,Wang, Limin,&Ge, Wei.(2017).Meso-scale statistical properties of gas-solid flowa direct numerical simulation (DNS) study.AICHE JOURNAL,63(1),3-14.
MLA Liu, Xiaowen,et al."Meso-scale statistical properties of gas-solid flowa direct numerical simulation (DNS) study".AICHE JOURNAL 63.1(2017):3-14.
Files in This Item:
File Name/Size DocType Version Access License
Meso-scale statistic(909KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu, Xiaowen]'s Articles
[Wang, Limin]'s Articles
[Ge, Wei]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Xiaowen]'s Articles
[Wang, Limin]'s Articles
[Ge, Wei]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Xiaowen]'s Articles
[Wang, Limin]'s Articles
[Ge, Wei]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.