水平气力输送管中颗粒浓度分布的数值模拟  

Numerical Study of Particle Phase Volume Fraction in the Horizontal Pneumatic Conveying Pipe

作　　者：罗志国[1] 倪冰[1] 陈韧[1] 邹宗树[1] 狄瞻霞[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《过程工程学报》2008年第S1期59-63,共5页The Chinese Journal of Process Engineering

摘　　要：以商业软件FLUENT为平台,通过UDF将DEM程序编译进FLUENT,利用DEM与CFD耦合的方法研究了水平管气力输送过程中颗粒粒径和密度对颗粒浓度分布的影响.结果表明,水平管道内颗粒浓度沿轴向方向不断降低,在管中心浓度逐渐扩散,使径向分布逐渐变得均匀;与双欧拉模型的计算结果不同,在管下部的高颗粒浓度区呈现出中心浓度高于边壁浓度的分布,而在管上部则表现为中心浓度低于边壁浓度的分布;随着颗粒密度及颗粒体积的增加,颗粒的跃动距离减少.Discrete element method(DEM)code was incorporated into the commercial computational fluid dynamics(CFD)software package FLUENT with user define functions(UDF),then the particle phase volume fraction in horizontal pneumatic conveying pipe was studied under the condition of different particle diameters and densities.The results show that the particle phase volume fraction decreases in axial direction and becomes evenly in radial direction along the direction of particle flow.Meanwhile,there is a different cal...

关 键 词：水平气力输送 颗粒浓度分布 计算流体力学 离散单元方法 

分 类 号：TQ019[化学工程]