{"title":"干燥颗粒物料床在垂直圆筒中以恒定速度旋转的独特动力学","authors":"Abhinesh Kumar, Prasanta Kumar Das","doi":"10.1007/s10035-023-01319-w","DOIUrl":null,"url":null,"abstract":"<div><p>The unique behavior of a bed of monodispersed dry granular matter confined in a rotating vertical cylinder has been investigated using DEM. At a constant rotational speed, the concave free surface shape exhibits an apparent similarity with the hydrodynamic counterpart of the same problem; but there are some unique differences arising from the particulate nature of the medium. In the rotating granular bed, the free surface profile is independent of the density and the size of the particles, but the local gradient of the free surface is not independent of the rotational speed. The results of a simulated experiment exhibit excellent matching with the free surface profiles obtained computationally and thus establish the efficacy of DEM in simulating the rigid body rotation of a particulate medium. However, the simulation results strongly suggest that though globally the bed behavior resembles solid body rotation, locally, the motion of the particles and their distribution is influenced by the discrete nature of the medium.</p><h3>Graphical abstract</h3>\n <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\n </div>","PeriodicalId":582,"journal":{"name":"Granular Matter","volume":"25 2","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The unique dynamics of a bed of dry granular material in a vertical cylinder rotating at a constant speed\",\"authors\":\"Abhinesh Kumar, Prasanta Kumar Das\",\"doi\":\"10.1007/s10035-023-01319-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The unique behavior of a bed of monodispersed dry granular matter confined in a rotating vertical cylinder has been investigated using DEM. At a constant rotational speed, the concave free surface shape exhibits an apparent similarity with the hydrodynamic counterpart of the same problem; but there are some unique differences arising from the particulate nature of the medium. In the rotating granular bed, the free surface profile is independent of the density and the size of the particles, but the local gradient of the free surface is not independent of the rotational speed. The results of a simulated experiment exhibit excellent matching with the free surface profiles obtained computationally and thus establish the efficacy of DEM in simulating the rigid body rotation of a particulate medium. However, the simulation results strongly suggest that though globally the bed behavior resembles solid body rotation, locally, the motion of the particles and their distribution is influenced by the discrete nature of the medium.</p><h3>Graphical abstract</h3>\\n <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\\n </div>\",\"PeriodicalId\":582,\"journal\":{\"name\":\"Granular Matter\",\"volume\":\"25 2\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2023-03-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Granular Matter\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10035-023-01319-w\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Granular Matter","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10035-023-01319-w","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
The unique dynamics of a bed of dry granular material in a vertical cylinder rotating at a constant speed
The unique behavior of a bed of monodispersed dry granular matter confined in a rotating vertical cylinder has been investigated using DEM. At a constant rotational speed, the concave free surface shape exhibits an apparent similarity with the hydrodynamic counterpart of the same problem; but there are some unique differences arising from the particulate nature of the medium. In the rotating granular bed, the free surface profile is independent of the density and the size of the particles, but the local gradient of the free surface is not independent of the rotational speed. The results of a simulated experiment exhibit excellent matching with the free surface profiles obtained computationally and thus establish the efficacy of DEM in simulating the rigid body rotation of a particulate medium. However, the simulation results strongly suggest that though globally the bed behavior resembles solid body rotation, locally, the motion of the particles and their distribution is influenced by the discrete nature of the medium.
期刊介绍：
Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science.
These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations.
>> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa.
The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.
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