Study on free fall surfaces in three-dimensional hopper flows

被引：24

作者：

Tian, Y. ^{[1
]}

Lin, P. ^{[1
]}

Zhang, S. ^{[1
,2
]}

Wang, C. L. ^{[1
]}

Wan, J. F. ^{[1
,2
]}

Yang, L. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

ADVANCED POWDER TECHNOLOGY | 2015年 / 26卷 / 04期

关键词：

Free fall surfaces; DEM; Funnel flow; GPU; PREDICTING DISCHARGE DYNAMICS; GRANULAR FLOW; MODEL; SOLIDS; SIMULATIONS; PRESSURE;

D O I：

10.1016/j.apt.2015.05.015

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The flow rate of grains discharging from hoppers can be quantified by Beverloo's law, where the assumption of the free fall arch (FFA) it is very useful in understanding the physical picture of this process but is difficult to be observed directly. Here simulations of 2,000,000 spheres discharging from three-dimensional flat-bottomed hopper with circular outlet were performed on multiple GPUs and the free fall surfaces were explored by statistical analysis. The free fall surfaces in hopper flows were plotted and can be fitted into parabolic surfaces. Other quantities, such as velocity fields and spatial profiles of coordination number, were investigated to support the free fall surfaces we obtained. Although inconsistent with the initial assumption, it is shown that the free fall surfaces can be statistically described and this work provides new insights for understanding the processes of hopper flows. (C) 2015 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：1191 / 1199

页数：9

共 41 条

[1] Predicting discharge dynamics from a rectangular hopper using the discrete element method (DEM) [J].

Anand, Anshu ;

Curtis, Jennifer S. ;

Wassgren, Carl R. ;

Hancock, Bruno C. ;

Ketterhagen, William R. .

CHEMICAL ENGINEERING SCIENCE, 2008, 63 (24) :5821-5830

[2] Predicting discharge dynamics of wet cohesive particles from a rectangular hopper using the discrete element method (DEM) [J].

Anand, Anshu ;

Curtis, Jennifer S. ;

Wassgren, Carl R. ;

Hancock, Bruno C. ;

Ketterhagen, William R. .

CHEMICAL ENGINEERING SCIENCE, 2009, 64 (24) :5268-5275

[3]

[Anonymous], COMPUTER SIMULATION

[4] On the role and the origin of the gas pressure gradient in the discharge of fine solids from hoppers [J].

Barletta, D ;

Donsì, G ;

Ferrari, G ;

Poletto, M .

CHEMICAL ENGINEERING SCIENCE, 2003, 58 (23-24) :5269-5278

[5] Dynamical Janssen effect on granular packing with moving walls -: art. no. 144301 [J].

Bertho, Y ;

Giorgiutti-Dauphiné, F ;

Hulin, JP .

PHYSICAL REVIEW LETTERS, 2003, 90 (14) :4

[6] THE FLOW OF GRANULAR SOLIDS THROUGH ORIFICES [J].

BEVERLOO, WA ;

LENIGER, HA ;

VANDEVELDE, J .

CHEMICAL ENGINEERING SCIENCE, 1961, 15 (3-4) :260-&

[7] Multiscale clustering in granular surface flows [J].

Bonamy, D ;

Daviaud, F ;

Laurent, L ;

Bonetti, M ;

Bouchaud, JP .

PHYSICAL REVIEW LETTERS, 2002, 89 (03)

[8]

Brown R.L., 1965, RHEOL ACTA, V4, P153, DOI DOI 10.1007/BF01969251

[9]

Brown R. L., 1970, PRINCIPLES POWDER ME

[10] MINIMUM ENERGY THEOREM FOR FLOW OF DRY GRANULES THROUGH APERTURES [J].

BROWN, RL .

NATURE, 1961, 191 (478) :458-&

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