DEM simulation of particle clustering characteristics in gas-solid CFB risers

WU Yingya; PENG Li; HE Ningning; GAO Jinsen; LAN Xingying

doi:10.11949/j.issn.0438-1157.20160440

您当前的位置：

首页 >

文章列表页 >

DEM simulation of particle clustering characteristics in gas-solid CFB risers

更新时间：2025-12-10

- DEM simulation of particle clustering characteristics in gas-solid CFB risers
- CIESC Journal Issue 8, Pages: 3321-3330(2016)
- 作者机构：
  
  中国石油大学(北京)重质油国家重点实验室,北京,102249
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160440
  CLC： Q021.1
- Online First：05 August 2016，
  
  Published：05 August 2016
- 稿件说明：
移动端阅览
WU Yingya, PENG Li, HE Ningning, et al. DEM simulation of particle clustering characteristics in gas-solid CFB risers[J]. CIESC Journal, 2016, (8): 3321-3330.
DOI：

WU Yingya, PENG Li, HE Ningning, et al. DEM simulation of particle clustering characteristics in gas-solid CFB risers[J]. CIESC Journal, 2016, (8): 3321-3330. DOI： 10.11949/j.issn.0438-1157.20160440.

摘要

采用CFD-DEM的方法对气固循环流化床提升管内的气固流动特性进行模拟，建立了基于图像处理的分析颗粒聚团的方法，重点研究了颗粒聚团在床层内的整体分布以及颗粒聚团的特性，包括颗粒聚团的倾角、球形度以及长短轴比的概率密度分布以及它们在床层内的轴向和径向上的分布特性。研究结果表明，聚团在床层内的分布较宽，较小的聚团居多，边壁区域附近易形成较大的聚团。聚团的数目沿床层高度方向先增加后减少。聚团倾向于以偏离球形聚团、较大的倾角形式存在，其长短轴比值在2～4之间。

Abstract

Gas-solid flow in CFB riser was simulated by a combined approach of computational fluid dynamics (CFD) and discrete element method (DEM). A new cluster analysis method based on image calibration and processing technique was developed to obtain overall

axial and radial distributions of clusters in fluidized beds as well as cluster characteristics in terms of inclination angle

degree of sphericity

and aspect ratio of long over short axis. The clusters showed a wide distribution with mainly small clusters and large clusters formed in the regions near the wall. Along the height direction of the riser

the amount of clusters first increased and then gradually decreased. In addition

clusters were most likely to exist in the form of non-spherical aggregates with large inclination angle and aspect ratio between 2 and 4.

关键词

Keywords

references

Views

227

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical simulation study of liquid-solid fluidized beds based on second-order moment model of particle dynamic restitution coefficient

Effect of granular collision parameters on DEM simulation of flow field intermittency in gas-solids bubbling fluidized bed

Analysis of flow field intermittency and coherent structure of particles based on DEM simulation of gas-solids bubbling bed

Fine grid DEM simulation of bed layer height in bubbling fluidized-bed

Thermodynamic performance of tower-type solar-assisted supercritical compression CO2 energy storage system

Related Author

CHEN Xi

WANG Shuyan

SHAO Baoli

DING Nuo

XIE Lei

PENG Li

WU Yingya

LI Jiayao

Related Institution

State Key Laboratory of Continental Shale Oil, School of Petroleum Engineering, Northeast Petroleum University

State Key Laboratory of Heavy Oil Processing, China University of Petroleum

School of Science, Northwestern Polytechnical University

Department of Mathematics, Gansu Normal University for Nationalities, Hezuo

School of Chemical Engineering, East China University of Science and Technology

⁰