Effect of Bed Depth on Granular Flow and Homogenization in a Vertical Bladed Mixer via Discrete Element Method

被引：13

作者：

Barczi, Tomas ^{[1
]}

Travnickova, Tereza ^{[2
]}

Havlica, Jaromir ^{[2
,3
]}

Kohout, Martin ^{[1
]}

机构：

[1] Univ Chem & Technol, Dept Chem Engn, Prague 16628, Czech Republic

[2] Acad Sci Czech Republ, Inst Chem Proc Fundamentals, CR-16502 Prague, Czech Republic

[3] Univ Jan Evangelista Purkinje, Usti Nad Labem, Czech Republic

来源：

CHEMICAL ENGINEERING & TECHNOLOGY | 2015年 / 38卷 / 07期

关键词：

Discrete element method; Flow patterns; Granular mixing; Homogenization; Recirculation zones; PARTICLES; SPEED; DEM;

D O I：

10.1002/ceat.201400686

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The mixing of powders and granular materials is decisive for the quality of a final product. Simulations of granular mixing via discrete element method are performed. Mixing was done in a vertical cylindrical mixer with two opposed flat blades with 90 degrees rake angle. The effects of packed-bed depth and blade rotational speed on the process of homogenization and on the development of flow patterns were evaluated. The process of homogenization was analyzed at macroscopic scale by global mixing indexes and at microscopic scale by the complex flow patterns with different nature. Macroscopic and microscopic approaches were connected and from flow pattern observation optimal conditions for the best homogenization were predicted.

引用

页码：1195 / 1202

页数：8

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