Granular discharge from concentric and eccentric wedge shaped hoppers: effect of wall friction coefficient on discharge rate

XU Pengkai; DUAN Xuezhi; QIAN Gang; ZHOU Xinggui

doi:10.11949/j.issn.0438-1157.20141434

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Granular discharge from concentric and eccentric wedge shaped hoppers: effect of wall friction coefficient on discharge rate

更新时间：2025-12-10

- Granular discharge from concentric and eccentric wedge shaped hoppers: effect of wall friction coefficient on discharge rate
- CIESC Journal Issue 3, Pages: 880-887(2015)
- 作者机构：
  
  华东理工大学化学工程联合国家重点实验室,上海,200237
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141434
  CLC： Q018
- Online First：05 March 2015，
  
  Published：05 March 2015
- 稿件说明：
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XU Pengkai, DUAN Xuezhi, QIAN Gang, et al. Granular discharge from concentric and eccentric wedge shaped hoppers: effect of wall friction coefficient on discharge rate[J]. CIESC Journal, 2015, (3): 880-887.
DOI：

XU Pengkai, DUAN Xuezhi, QIAN Gang, et al. Granular discharge from concentric and eccentric wedge shaped hoppers: effect of wall friction coefficient on discharge rate[J]. CIESC Journal, 2015, (3): 880-887. DOI： 10.11949/j.issn.0438-1157.20141434.

摘要

采用离散元方法(DEM)研究了在不同的内摩擦系数、料仓半锥角和料仓宽度条件下

楔形中心料仓和偏心料仓中壁面摩擦系数对卸料速率的影响。研究发现

随着壁面摩擦系数的增加

两种料仓的卸料速率均先降低后稳定。当料仓从中心料仓变为偏心料仓时

壁面摩擦系数对卸料速率的影响程度以及卸料速率停止下降时的壁面摩擦系数的值都增大。随着内摩擦系数的减小或料仓半锥角的增大

壁面摩擦系数对卸料速率的影响程度以及卸料速率停止下降时的壁面摩擦系数的值都逐渐减小。增加料仓宽度能够削弱壁面摩擦系数对卸料速率的影响程度

但并不改变卸料速率停止下降时的壁面摩擦系数的值。

Abstract

Particle discharging from concentric and eccentric wedge shaped hoppers with different internal friction coefficients

hopper half angles and hopper widths was simulated by 3D discrete element method (DEM) and the effect of wall friction coefficient on discharging rate were investigated. In general

increasing wall friction coefficient would decrease discharging rate by retarding particle-wall slip

and the effect was more significant in wedge shaped hoppers. The friction coefficient in the convergent section had a stronger effect in reducing discharging rate than that in the vertical section. When internal friction coefficient decreased

or the width of the hopper increased

the retarding effect would decrease and eventually become insignificant.

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