不同粘性颗粒对卧式螺带混合机混合性能的影响研究

来源 :中国计算力学大会2018暨国际华人计算力学大会2018 | 被引量 : 0次 | 上传用户:ericwu8756
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  本文以卧式螺带颗粒混合机为研究背景,采用离散单元法(Discrete Element Method,DEM)研究叶轮转速和填充率对卧式螺带混合机中不同粘性颗粒混合行为的影响。首先采用Pro/E 软件对卧式螺带混合机进行三维模型创建,然后采用EDEM 软件对混合机内颗粒物料混合进行数值模拟,并对其混合效果进行分析。结果 表明,对于粘性颗粒和非粘性颗粒混合物,混合速率随着叶轮速度的增加而增加,直到一定的速度后,混合速率会随着叶轮速度的增加混合速度表现出降低的现象。在相同的叶轮转速条件下,混合粘性颗粒时,水平轴向存在颗粒对流现象,颗粒物料沿叶轮转轴周向流动,能有效促进物料颗粒的混合性能;混合非粘性颗粒时,物料颗粒在混合机中存在局部循环流动现象,此现象的发生能抑制整体的混合效果。
其他文献
Large Tine Step is a high efficiency Scheme for the hyperbolic systems.The time step can be extended to break through the CFL restrictions.It has been used in aerodynamics and shallow water equations,
For 1D and 2D elastic-plastic flows with the hypo-elastic constitutive model and von Mises yielding condition,the non-conservative character of the hypo-elastic constitutive model and the von Mises yi
The present study aims to analyze the compressibility modification effects for conventional RANS(Reynolds-Averaged Navier-Stokes)simulation for high-subsonic jet flow,and furthermore the jet noise ana
When non-Newtonian power-law fluid governing equations are solved by finite element method(FEM),it will be noticed that the power-law terms in the equations are difficult to handle with.In this paper,
会议
Studies have shown that the whisker of the harbor seal,which exhibits a wavy shape,has a good ability to detect the preys tail flow,therefore this finding promotes the recent study of fluid engineerin
催化剂离心喷雾干燥制备过程是一个伴有传质、传热,液体蒸发相变的高温气体-颗粒两相湍流的复杂过程。采用流体动力学软件CFX 对催化剂干燥过程进行数值模拟,考虑到热风分配器的二级导流作用,着眼于干燥气体的湍流状态,以流体的宏观热力学和动力学参数描述流体微分方程,基于欧拉模型及拉格朗日体系的离散颗粒相模型,建立数学模型进行数值分析求解,得到塔内气流场、温度场、湿度场以及颗粒相干燥过程。并将仿真预测的数据
可压缩钝体绕流广泛存在于工程实际问题中,为了进一步分析其力学特性,本文采用格子Boltzmann 方法耦合双分布函数模型开展了可压缩粘性流体流动的数值模拟。计算中,时间项和空间项分别采用隐显龙格库塔和二阶迎风离散,同时,基于CUDA-C,将CPU 程序移植于GPU 上加速。
The transport behavior of bed-load in natural rivers shows the nature of anomalous transport(non-Fick)behavior that cannot be properly quantified by using the theory of Ficks law.Continuous time rando
The supercritical natural laminar airfoils are obtained by optimizing a conventional supercritical airfoil which shock control bumps.Both of airfoil and shock control parameters are optimized simultan