Fluid effects on the dilatancy of two-phase gravity-driven granular flows
文献类型：期刊论文
| 作者 | Zhao, Yuting4; Bowman, Elisabeth T.3; Zhou, Gordon G. D.1,2,4; Cui, Kahlil F. E.4; Xie, Yunxu2,4; Lu, Xueqiang4 |
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2025-09-01 |
| 卷号 | 37期号:9页码:16 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0291548 |
| 通讯作者 | Zhou, Gordon G. D.(gordon@imde.ac.cn) |
| 英文摘要 | Volume fraction of solid grains plays a critical role in determining the dynamics of granular flows. The evolution of volume fraction is governed by flow dilatancy depending on the rheological behavior of solid-fluid mixtures and, hence, the pore fluid effects, which are dominated by apparent cohesion and viscous drag in unsaturated and saturated flows, respectively. Prevailing approaches for predicting volume fraction in wet granular flows using two-phase flow models have been proven valid for submerged granular flows or suspensions that conform to visco-inertial rheology. However, for unsaturated granular flows, widely accepted methods for volume fraction modeling remain lacking, due to the cohesive interaction mechanisms not yet being fully described. In this study, we conducted small-scale flume experiments using uniform pseudo-spherical ceramic beads, with initial water content progressively varied from dry to oversaturated states. The dynamics of the experimental flows were captured by sensor measurements and image processing techniques, with solid volume fraction evolution obtained by particle tracking velocimetry. We incorporated our experimental data into the mu(K) (visco-inertial) and mu(I-m) (extended inertial) rheological frameworks constructed for two-phase flows and then contrasted the fitting performance of the two corresponding volume fraction scaling models, Phi(K) and Phi(I-m), through error analysis. We demonstrate here for the first time the excellent validity of Phi(I-m) scaling for both unsaturated and saturated granular flows in which the dominated fluid effect ranges from apparent cohesion to viscous shear; by contrast, Phi K scaling shows significantly better applicability to saturated granular flows than to unsaturated flows. |
| WOS关键词 | DEBRIS FLOWS ; MECHANISMS ; LANDSLIDE ; MOBILITY ; TORRENT ; FORCES ; DESIGN ; MODEL ; MASS |
| 资助项目 | National Natural Science Foundation of China10.13039/501100001809[U24A20618] ; National Natural Science Foundation of China[2024NSFJQ0043] ; Sichuan Science and Technology Program[SKHL2308] ; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University[IN-2016-041] ; Leverhulme Trust International Network Grant |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001569355800037 |
| 出版者 | AIP Publishing |
| 资助机构 | National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China ; Sichuan Science and Technology Program ; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University ; Leverhulme Trust International Network Grant |
| 源URL | [http://ir.imde.ac.cn/handle/131551/59157]  |
| 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 | Zhou, Gordon G. D. |
| 作者单位 | 1.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad, Pakistan 2.Univ Chinese Acad Sci, Beijing 100000, Peoples R China 3.Univ Sheffield, Sch Mech Aerosp & Civil Engn, Sheffield S1 3JD, England 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Engn Resiliences, Chengdu 610000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Yuting,Bowman, Elisabeth T.,Zhou, Gordon G. D.,et al. Fluid effects on the dilatancy of two-phase gravity-driven granular flows[J]. PHYSICS OF FLUIDS,2025,37(9):16. |
| APA | Zhao, Yuting,Bowman, Elisabeth T.,Zhou, Gordon G. D.,Cui, Kahlil F. E.,Xie, Yunxu,&Lu, Xueqiang.(2025).Fluid effects on the dilatancy of two-phase gravity-driven granular flows.PHYSICS OF FLUIDS,37(9),16. |
| MLA | Zhao, Yuting,et al."Fluid effects on the dilatancy of two-phase gravity-driven granular flows".PHYSICS OF FLUIDS 37.9(2025):16. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。