检索结果-南通市图书馆

discrete particle simulation OF SIZE SEGREGATION OF particle MIXTURES IN A GAS FLUIDIZED BED

Particuology 2006年第Z1期 122-126页

作者： Y. Q. Feng1,2 and A. B. Yu1,* 1Center for simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney NSW 2052, Australia 2Divisions of Minerals, Commonwealth Scientific and Industrial Research Organization, Box 312, Clayton South, Victoria 3169, Australia

This paper presents a study of the mixing/segregation behaviour of particle mixtures in a gas fluidized bed by use of the discrete particle simulation. Spherical particles with diameters 2 mm (jetsam) and 1 mm (flotsam) and den- sity 2 500 kg?m-3 are used as solid mixtures with different volume fractions. The particles are initially packed uniformly in a rectangular bed and then fluidized by gas uniformly injected at the bottom of the bed. The gas injection velocities vary to cover fixed, partially and fully fluidized bed conditions. Segregation/mixing behaviour is discussed in terms of flow patterns, solid concentration profile and mixing kinetics. The results show that segregation, as a transient fluidization process, is strongly affected by gas injection velocities for a given particle mixture. With the increase of the volume frac- tion of flotsam, size segregation appears at lower velocities.

关键词： gas fluidization segregation discrete particle simulation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

discrete particle simulation OF SIZE SEGREGATION OF particle MIXTURES IN A GAS FLUIDIZED BED

引用

China Particuology 2006年第3期4卷 122-126页

作者： Y. Q. Feng A. B. Yu Center for simulation and Modelling of Particulate Systems School of Materials Science and Engineering The University of New South Wales Sydney NSW 2052 Australia Divisions of Minerals Commonwealth Scientific and Industrial Research Organization Box 312 Clayton South Victoria 3169 Australia

This paper presents a study of the mixing/segregation behaviour of particle mixtures in a gas fluidized bed by use of the discrete particle simulation. Spherical particles with diameters 2 mm （jetsam） and 1 mm （flotsam） and density 2 500 kg.m^-3 are used as solid mixtures with different volume fractions. The particles are initially packed uniformly in a rectangular bed and then fluidized by gas uniformly injected at the bottom of the bed. The gas injection velocities vary to cover fixed, partially and fully fluidized bed conditions. Segregation/mixing behaviour is discussed in terms of flow patterns, solid concentration profile and mixing kinetics. The results show that segregation, as a transient fluidization process, is strongly affected by gas injection velocities for a given particle mixture. With the increase of the volume fraction of flotsam, size segregation appears at lower velocities.

关键词： gas fluidization segregation discrete particle simulation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

discrete particle simulation Applied to Blast Furnace Modelling

Discrete Particle Simulation Applied to Blast Furnace Modell...

引用

技术创新与循环经济——第二届宝钢学术年会

作者： P.ZULLI Bluescope Steel Research P.O.Box 202Port KemblaNSW 2505Australia

＜正＞The paper presents a brief review of the recent studies of particle and particle - fluid flow in an ironmaking blast furnace（BF） by means of discrete particle simulation coupled with the conventional computational fluid *** key features of this method are described *** the results are discussed with reference to four research areas in BF modelling:burden distribution at the top,gas -solid flow in the shaft, gas - solid flow in the raceway,and solid flow in the *** is shown that this approach does capture the main features of the complex BF flow and is an effective way to generate particle scale information for better fundamental understanding.

关键词： discrete particle simulation blast furnace solid flow particle-fluid flow

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

An analysis of the chaotic motion of particles of different sizes in a gas fluidized bed

引用

Particuology 2008年第6期6卷 549-556页

作者： Y.Q. Feng A.B. Yu Lab for simulation and Modelling of Particulate Systems School of Materials Science and Engineering University of New South Wales Sydney NSW 2052 Australia

The dynamic behavior of individual particles during the mixing/segregation process of particle mixtures in a gas fluidized bed is analyzed. The analysis is based on the results generated from discrete particle simulation, with the focus on the trajectory of and forces acting on individual particles. Typical particles are selected representing three kinds of particle motion： a flotsam particle which is initially at the bottom part of the bed and finally fluidized at the top part of the bed; a jetsam particle which is initially at the top part of the bed and finally stays in the bottom de-fluidized layer of the bed; and a jetsam particle which is intermittently joining the top fluidized and bottom de-fluidized layers. The results show that the motion of a particle is chaotic at macroscopic or global scale, but can be well explained at a microscopic scale in terms of its interaction forces and contact conditions with other particles, particle-fluid interaction force, and local flow structure. They also highlight the need for establishing a suitable method to link the information generated and modeled at different time and length scales.

关键词： Fluidization Segregation discrete particle simulation Granular dynamics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：