当前位置: X-MOL 学术Granular Matter › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Rolling friction measurement of slightly non-spherical particles using direct experiments and image analysis
Granular Matter ( IF 2.3 ) Pub Date : 2021-05-28 , DOI: 10.1007/s10035-021-01124-3
Arpit Agarwal , Anurag Tripathi , Aman Tripathi , Vimod Kumar , Arijit Chakrabarty , Samik Nag

Abstract

In absence of any direct measurement method of rolling friction for particles that deviate from perfectly spherical shape, most DEM simulation studies use bulk calibration approach to estimate an acceptable value of this parameter. A novel method based on image analysis of static grains is proposed to calculate the rolling friction coefficient of particles that deviate slightly from the spherical shape. To compare these values obtained from image analysis, direct measurement of the rolling friction coefficient of industrial pellet particles of slightly non-spherical shape is done using two different methods. The first method involves video analysis to track the position of particles rolling over an inclined plane. The second method proposes modifications to the ASTM standard method of rolling friction measurement of spherical particles to enable measurements for slightly non-spherical particles. Results obtained from the image analysis method are found to be in very good agreement with directly measured rolling friction values. Following this approach, it is possible to measure the rolling friction coefficient of particles using image analysis in a manner similar to measuring the particle size distribution. The image analysis method can be utilised for rolling friction estimation in situations where direct measurement is not possible and has potential for wide usage in DEM simulations of the powders and bulk solids.

Graphic Abstract



中文翻译:

使用直接实验和图像分析测量轻微非球形颗粒的滚动摩擦

摘要

由于没有任何直接测量偏离完美球形的粒子的滚动摩擦力的方法,大多数 DEM 模拟研究使用批量校准方法来估计该参数的可接受值。提出了一种基于静态晶粒图像分析的新方法来计算与球形略有偏离的颗粒的滚动摩擦系数。为了比较从图像分析中获得的这些值,使用两种不同的方法直接测量略微非球形的工业颗粒的滚动摩擦系数。第一种方法涉及视频分析以跟踪在倾斜平面上滚动的粒子的位置。第二种方法建议对球形颗粒滚动摩擦测量的 ASTM 标准方法进行修改,以实现对轻微非球形颗粒的测量。发现从图像分析方法获得的结果与直接测量的滚动摩擦值非常一致。按照这种方法,可以以类似于测量粒度分布的方式使用图像分析来测量颗粒的滚动摩擦系数。在不可能直接测量的情况下,该图像分析方法可用于滚动摩擦估算,并且在粉末和散装固体的DEM模拟中具有广泛的应用潜力。发现从图像分析方法获得的结果与直接测量的滚动摩擦值非常一致。按照这种方法,可以以类似于测量粒度分布的方式使用图像分析来测量颗粒的滚动摩擦系数。图像分析方法可用于无法直接测量的情况下的滚动摩擦估计,并且在粉末和散装固体的 DEM 模拟中具有广泛使用的潜力。发现从图像分析方法获得的结果与直接测量的滚动摩擦值非常一致。按照这种方法,可以以类似于测量粒度分布的方式使用图像分析来测量颗粒的滚动摩擦系数。图像分析方法可用于无法直接测量的情况下的滚动摩擦估计,并且在粉末和散装固体的 DEM 模拟中具有广泛使用的潜力。

图形摘要

更新日期:2021-05-28
down
wechat
bug