不同形状混合器中二元颗粒的分聚与混合研究

发布时间：2018-05-14 12:58

本文选题：颗粒体系 + 分聚与混合　；参考：《力学学报》2016年01期

【摘要】：采用实验、模拟及理论的分析方法,研究了在圆形混合器、椭圆形混合器、正方形混合器中,不同转速和填充率条件下,容器形状对二元颗粒体系分聚与混合的影响.实验中通过改变转速与填充率,可获得不同的颗粒分聚与混合图样,对示踪颗粒运动轨迹的分析发现,在圆形混合器中,随着混合器转速的增大,颗粒在径向的随机性减少;在正方形混合器中,随着混合器转速的增大,颗粒在径向的随机性增大.模拟结果发现颗粒流动分为两个区域,在表面的快速流动和在整体的旋转运动.通过理论分析发现颗粒分聚在圆形混合器中最明显,在正方形混合器中最弱,椭圆形混合器介于二者之间.
[Abstract]:By means of experiment, simulation and theoretical analysis, the effects of vessel shape on the separation and mixing of binary particles in circular mixer, elliptical mixer and square mixer with different rotational speeds and filling rates were studied. Different particle separation and mixing patterns can be obtained by changing rotating speed and filling rate. The analysis of trace particle trajectory shows that the randomness of particle in radial direction decreases with the increase of mixer speed in circular mixer. In a square mixer, the randomness of particles in the radial direction increases with the increase of the mixer speed. The simulation results show that the particle flow is divided into two regions, the fast flow on the surface and the rotational motion in the whole. Through theoretical analysis, it is found that the particle segregation is the most obvious in the circular mixer, the weakest in the square mixer, and the elliptical mixer is between the two.
【作者单位】：中科院物理所软物质物理重点实验室北京凝聚态物理国家实验室;西北师范大学物理与电子工程学院;贵州大学理学院;
【基金】：国家自然科学基金(11274354,11275156,91226101,11474326) 地震行业科研经费(201208011) 中国科学院空间科学战略性先导科技专项(XDA04020200)资助项目
【分类号】：O347.7

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