{"title":"Characterizing flowability of granular materials by onset of jamming in orifice flows","authors":"P. Mort","doi":"10.4279/PIP.070004","DOIUrl":null,"url":null,"abstract":"This paper describes methods to measure flow rate and jamming onset of granules discharged through a flat-bottom cylindrical hopper with a circular orifice. The intrinsic jamming onset for ideal particles (spherical, monodisperse, smooth) is experimentally measured by two independent methods, with good agreement. For non-ideal particles, the normalized jamming onset increases with elongated granule shape, broadened size distribution and increased friction as measured by the drained angle of repose. An empirical model of the jamming onset is introduced to quantify these effects over the range of materials investigated. The jamming onset can be used as a measure of differentiation between relatively free-flowing granules. Received: 17 Novembre 2014, Accepted: 2 March 2015; Edited by: L. A. Pugnaloni; Reviewed by: G. Lumay, University of Liege, Belgium; DOI: http://dx.doi.org/10.4279/PIP.070004 Cite as: P Mort, Papers in Physics 7, 070004 (2015) This paper, by Paul Mort , is licensed under the Creative Commons Attribution License 3.0 .","PeriodicalId":19791,"journal":{"name":"Papers in Physics","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Papers in Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4279/PIP.070004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 6
Abstract
This paper describes methods to measure flow rate and jamming onset of granules discharged through a flat-bottom cylindrical hopper with a circular orifice. The intrinsic jamming onset for ideal particles (spherical, monodisperse, smooth) is experimentally measured by two independent methods, with good agreement. For non-ideal particles, the normalized jamming onset increases with elongated granule shape, broadened size distribution and increased friction as measured by the drained angle of repose. An empirical model of the jamming onset is introduced to quantify these effects over the range of materials investigated. The jamming onset can be used as a measure of differentiation between relatively free-flowing granules. Received: 17 Novembre 2014, Accepted: 2 March 2015; Edited by: L. A. Pugnaloni; Reviewed by: G. Lumay, University of Liege, Belgium; DOI: http://dx.doi.org/10.4279/PIP.070004 Cite as: P Mort, Papers in Physics 7, 070004 (2015) This paper, by Paul Mort , is licensed under the Creative Commons Attribution License 3.0 .
本文介绍了一种测量颗粒通过带圆孔的平底圆筒料斗排出时的流量和堵塞起爆率的方法。用两种独立的方法测量了理想粒子(球形、单分散、光滑)的本征干扰，结果吻合较好。对于非理想颗粒，随颗粒形状的拉长、尺寸分布的扩大和摩擦的增加，归一化干扰开始时间增加。一个经验模型的干扰开始被引入量化这些影响的材料范围内的研究。干扰的开始可以作为相对自由流动的颗粒之间的区分措施。收稿日期:2014年11月17日，收稿日期:2015年3月2日;编辑:L. A. Pugnaloni;审评人:G. Lumay，比利时列日大学;本文由Paul Mort撰写，采用知识共享署名许可3.0协议进行授权。
期刊介绍：
Papers in Physics publishes original research in all areas of physics and its interface with other subjects. The scope includes, but is not limited to, physics of particles and fields, condensed matter, relativity and gravitation, nuclear physics, physics of fluids, biophysics, econophysics, chemical physics, statistical mechanics, soft condensed matter, materials science, mathematical physics and general physics. Contributions in the areas of foundations of physics, history of physics and physics education are not considered for publication. Articles published in Papers in Physics contain substantial new results and ideas that advance the state of physics in a non-trivial way. Articles are strictly reviewed by specialists prior to publication. Papers in Physics highlights outstanding articles published in the journal through the Editors'' choice section. Papers in Physics offers two distinct editorial treatments to articles from which authors can choose. In Traditional Review, manuscripts are submitted to anonymous reviewers seeking constructive criticism and editors make a decision on whether publication is appropriate. In Open Review, manuscripts are sent to reviewers. If the paper is considered original and technically sound, the article, the reviewer''s comments and the author''s reply are published alongside the names of all involved. This way, Papers in Physics promotes the open discussion of controversies among specialists that are of help to the reader and to the transparency of the editorial process. Moreover, our reviewers receive their due recognition by publishing a recorded citable report. Papers in Physics publishes Commentaries from the reviewer(s) if major disagreements remain after exchange with the authors or if a different insight proposed is considered valuable for the readers.
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