Meso-scale statistical properties of gas-solid flowa direct numerical simulation (DNS) study
文献类型：期刊论文
| 作者 | Liu, Xiaowen1,2; Wang, Limin1; Ge, Wei1 |
| 刊名 | AICHE JOURNAL
 |
| 出版日期 | 2017 |
| 卷号 | 63期号:1页码:3-14 |
| 关键词 | direct numerical simulation meso-scale structure statistical analysis gas-solid flow fluidization |
| ISSN号 | 0001-1541 |
| 英文摘要 | 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 |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CIRCULATING FLUIDIZED-BED ; DISCRETE PARTICLE SIMULATION ; STRUCTURE-DEPENDENT DRAG ; VELOCITY FLUCTUATIONS ; GRANULAR ASSEMBLIES ; KINETIC-THEORY ; SLIP VELOCITY ; CFB RISER ; SYSTEMS ; DYNAMICS |
| 收录类别 | SCI ; ISTP |
| 语种 | 英语 |
| WOS记录号 | WOS:000390272500002 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/21858]  |
| 专题 | 过程工程研究所_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, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：过程工程研究所
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