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Experimental investigation of immersed granular collapse in viscous and inertial regimes
Sun YH(孙云辉)1; Zhang WT(张炆涛)2,3; An Y(安翼)2; Liu QQ(刘青泉)1; Wang XL(王晓亮)1
Corresponding AuthorLiu, Qingquan( ; Wang, Xiaoliang(
Source PublicationPHYSICS OF FLUIDS
AbstractThis paper presents an experimental investigation of immersed granular collapse with an initially dense packing, mainly focusing on the collapse characteristics of different flow regimes and the influence of the initial aspect ratio. A novel experimental setup and imaging method are introduced to simultaneously observe the motion of the particles and the fluid. The collapse dynamics, including the collapse acceleration, steady propagation velocity, and collapse duration, are analyzed based on the front propagation. It is found that the collapse procedures in the inertial and viscous regimes differ significantly, with the transitional regime possessing some unique characteristics of both. The inertial regime exhibits a faster collapse process, sharper final deposition, and a depression near the right wall in the case of high columns. The viscous regime collapses from the upper-left corner, from where particles drop to the bottom and form the flow front in advance of the particles initially at the bottom, and exhibits a triangular final deposition. The inertial regime exhibits swirling fluid motion, which helps the granular transport, whereas the fluid flow in the viscous regime mainly follows the granular flow. The collapse regime characteristics are more pronounced in higher columns.

Indexed BySCI ; EI
WOS IDWOS:000710668300005
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
Funding ProjectNational Natural Science Foundation of China[12032005] ; National Natural Science Foundation of China[12172057]
Funding OrganizationNational Natural Science Foundation of China
ContributorLiu, Qingquan ; Wang, Xiaoliang
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China;
2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;
3.Midea Corp Res Ctr, Foshan 528311, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Sun YH,Zhang WT,An Y,et al. Experimental investigation of immersed granular collapse in viscous and inertial regimes[J]. PHYSICS OF FLUIDS,2021,33(10):12.
APA 孙云辉,张炆涛,安翼,刘青泉,&王晓亮.(2021).Experimental investigation of immersed granular collapse in viscous and inertial regimes.PHYSICS OF FLUIDS,33(10),12.
MLA 孙云辉,et al."Experimental investigation of immersed granular collapse in viscous and inertial regimes".PHYSICS OF FLUIDS 33.10(2021):12.
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