Attractive particle interaction forces and packing density of fine glass powders

被引：140
|
作者：
Parteli, Eric J. R. [1 ]
Schmidt, Jochen [2 ]
Bluemel, Christina [2 ]
Wirth, Karl-Ernst [2 ]
Peukert, Wolfgang [2 ]
Poeschel, Thorsten [1 ]
机构：
[1] Univ Erlangen Nurnberg, Nurnberg, Germany
[2] Univ Erlangen Nuremberg FAU, Inst Particle Technol LFG, D-91058 Erlangen, Germany
来源：
SCIENTIFIC REPORTS | 2014年 / 4卷
关键词：
COEFFICIENT; RESTITUTION; SIMULATION; DEM; LONDON; MODELS;
D O I：
10.1038/srep06227
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We study the packing of fine glass powders of mean particle diameter in the range (4-52) mm both experimentally and by numerical DEM simulations. We obtain quantitative agreement between the experimental and numerical results, if both types of attractive forces of particle interaction, adhesion and non-bonded van der Waals forces are taken into account. Our results suggest that considering only viscoelastic and adhesive forces in DEM simulations may lead to incorrect numerical predictions of the behavior of fine powders. Based on the results from simulations and experiments, we propose a mathematical expression to estimate the packing fraction of fine polydisperse powders as a function of the average particle size.
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页数：7
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