Particle Size Segregation in Granular Mass Flows With Different Ambient Fluids
文献类型：期刊论文
| 作者 | Zhou, Gordon G. D.5,6 ; Cui, Kahlil F. E.5,6; Jing, Lu3,4; Zhao, Tao2,6; Song, Dongri5,6; Huang, Yu1
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
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| 出版日期 | 2020-10-01 |
| 卷号 | 125期号:10页码:e2020JB019536 |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2020JB019536 |
| 产权排序 | 1 |
| 通讯作者 | Cui, Kahlil F. E.(kfcui@imde.ac.cn) |
| 文献子类 | Article |
| 英文摘要 | Size segregation, which is a robust feature of sheared granular mixtures and geophysical mass flow deposits, is found to diminish in the presence of a viscous fluid. We study this inhibitive effect through coupled fluid-particle simulations of granular flows fully immersed in different ambient fluids. Granular-fluid mixture flows are modeled according to three distinct flow regimes-free fall, fluid inertial, and viscous-at different angles of inclination. Each flow regime corresponds to distinct flow dynamics and segregation behaviors. We find that segregation is indeed weaker and slower in the presence of an ambient fluid, which is more so as the flow becomes more viscous. The ambient fluid affects segregation in two major ways. First, buoyancy reduces the contact pressure gradients which are needed to drive large particles up, while at the same time reduces the particles' apparent weight. On the other hand, the streamwise drag force substantially changes the flow rheology, specifically the shear rate profile, thereby modifying the segregation behavior in the normal direction. Surprisingly, the fluid drag in the normal direction is negligible regardless of the fluid viscosity and does not affect segregation in a direct manner. |
| 电子版国际标准刊号 | 2169-9356 |
| WOS关键词 | YIELD-STRESS FLUID ; DEPOSITIONAL MECHANISMS ; MIXTURE THEORY ; MORPHOLOGY ; SIMULATION ; REGIMES ; RUNOUT ; MODEL |
| 资助项目 | National Natural Science Foundation of China[41941017] ; National Natural Science Foundation of China[11672318] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC010] ; CAS Light of West China Program ; CAS-TWAS President's Fellowship for International PhD students |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000604458900005 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; CAS Light of West China Program ; CAS-TWAS President's Fellowship for International PhD students |
| 源URL | [http://ir.imde.ac.cn/handle/131551/55201]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | Cui, Kahlil F. E. |
| 作者单位 | 1.Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai, Peoples R China 2.Brunel Univ London, Dept Civil & Environm Engn, London, England 3.Northwestern Univ, Dept Chem & Biol Engn, Evanston, IL USA 4.Univ Hong Kong, Dept Civil Engn, Hong Kong, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China 6.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Gordon G. D.,Cui, Kahlil F. E.,Jing, Lu,et al. Particle Size Segregation in Granular Mass Flows With Different Ambient Fluids[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2020,125(10):e2020JB019536. |
| APA | Zhou, Gordon G. D.,Cui, Kahlil F. E.,Jing, Lu,Zhao, Tao,Song, Dongri,&Huang, Yu.(2020).Particle Size Segregation in Granular Mass Flows With Different Ambient Fluids.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,125(10),e2020JB019536. |
| MLA | Zhou, Gordon G. D.,et al."Particle Size Segregation in Granular Mass Flows With Different Ambient Fluids".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 125.10(2020):e2020JB019536. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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