{"title":"含水量对颗粒柱崩塌影响的数值研究","authors":"Xihua Chu, Zijian Zhu, Lian Wang","doi":"10.1007/s10035-023-01324-z","DOIUrl":null,"url":null,"abstract":"<div><p>Water can strongly affect the mechanical behavior of granular materials. In this study, numerical simulation is conducted to investigate the effect of water content described by saturation on the collapse of granular columns. A coupled CFD-DEM model is adopted for the wet granular materials from pendular state to capillary state (saturation from 30 to100%), and the discrete element-liquid bridge model is adopted for the wet granular materials of pendular state (saturation less than 30%). The influence of saturation, particle radius, and friction on the shape of the deposit is studied, and the final deposit boundary is fitted by a bilinear model. In addition, the fluidity is studied by the motion of mass center of granular materials. Numerical examples show that within the saturation range from 0.1 to 0.5% and from 30 to 100%, the water has an obvious effect on final deposit shape. Within the saturation range of 0.5–30%, the water has little effect on the final deposit shape. For the saturation range of 0.1–0.5%, the fluidity decreases with the increase of saturation, and when the saturation is more than 30%, the fluidity increases with the increase of saturation. The study revealed the influence of interstitial water on the fluidity of granular materials, which is significant for the researches of geological engineering problems, such as landslides.</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":"2023-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10035-023-01324-z.pdf","citationCount":"1","resultStr":"{\"title\":\"Numerical investigation on the influence of water content on collapse of granular columns\",\"authors\":\"Xihua Chu, Zijian Zhu, Lian Wang\",\"doi\":\"10.1007/s10035-023-01324-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Water can strongly affect the mechanical behavior of granular materials. In this study, numerical simulation is conducted to investigate the effect of water content described by saturation on the collapse of granular columns. A coupled CFD-DEM model is adopted for the wet granular materials from pendular state to capillary state (saturation from 30 to100%), and the discrete element-liquid bridge model is adopted for the wet granular materials of pendular state (saturation less than 30%). The influence of saturation, particle radius, and friction on the shape of the deposit is studied, and the final deposit boundary is fitted by a bilinear model. In addition, the fluidity is studied by the motion of mass center of granular materials. Numerical examples show that within the saturation range from 0.1 to 0.5% and from 30 to 100%, the water has an obvious effect on final deposit shape. Within the saturation range of 0.5–30%, the water has little effect on the final deposit shape. For the saturation range of 0.1–0.5%, the fluidity decreases with the increase of saturation, and when the saturation is more than 30%, the fluidity increases with the increase of saturation. The study revealed the influence of interstitial water on the fluidity of granular materials, which is significant for the researches of geological engineering problems, such as landslides.</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\":\"2023-04-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10035-023-01324-z.pdf\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Granular Matter\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10035-023-01324-z\",\"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/s10035-023-01324-z","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}
Numerical investigation on the influence of water content on collapse of granular columns
Water can strongly affect the mechanical behavior of granular materials. In this study, numerical simulation is conducted to investigate the effect of water content described by saturation on the collapse of granular columns. A coupled CFD-DEM model is adopted for the wet granular materials from pendular state to capillary state (saturation from 30 to100%), and the discrete element-liquid bridge model is adopted for the wet granular materials of pendular state (saturation less than 30%). The influence of saturation, particle radius, and friction on the shape of the deposit is studied, and the final deposit boundary is fitted by a bilinear model. In addition, the fluidity is studied by the motion of mass center of granular materials. Numerical examples show that within the saturation range from 0.1 to 0.5% and from 30 to 100%, the water has an obvious effect on final deposit shape. Within the saturation range of 0.5–30%, the water has little effect on the final deposit shape. For the saturation range of 0.1–0.5%, the fluidity decreases with the increase of saturation, and when the saturation is more than 30%, the fluidity increases with the increase of saturation. The study revealed the influence of interstitial water on the fluidity of granular materials, which is significant for the researches of geological engineering problems, such as landslides.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
