DOI: 10.1002/2014GL059229
论文题名: Settling into dry granular media in different gravities
作者: Altshuler E. ; Torres H. ; González-Pita A. ; Sánchez-Colina G. ; Pérez-Penichet C. ; Waitukaitis S. ; Hidalgo R.C.
刊名: Geophysical Research Letters
ISSN: 0094-10090
EISSN: 1944-9821
出版年: 2014
卷: 41, 期: 9 起始页码: 3032
结束页码: 3037
语种: 英语
英文关键词: Granular
; Gravity
; Sedimentation
; Settling
; Surface morphology
Scopus关键词: Asteroids
; Granular materials
; Gravitation
; Surface morphology
; Celestial bodies
; Discrete element modeling
; Dry granular media
; Granular
; Granular media
; Keypoints
; Settling
; Settling time
; Sedimentation
; asteroid
; discrete element method
; geomorphology
; granular medium
; gravity
; Jupiter
; numerical model
; sedimentation
; timescale
; unmanned vehicle
英文摘要: While the penetration of objects into granular media is well-studied, there is little understanding of how objects settle in gravities, geff, different from that of Earth - a scenario potentially relevant to the geomorphology of planets and asteroids and also to their exploration using man-made devices. By conducting experiments in an accelerating frame, we explore geff ranging from 0.4 g to 1.2 g. Surprisingly, we find that the rest depth is independent of geff and also that the time required for the object to come to rest scales like geff-1/2. With discrete element modeling simulations, we reproduce the experimental results and extend the range of geff to objects as small as asteroids and as large as Jupiter. Our results shed light on the initial stage of sedimentation into dry granular media across a range of celestial bodies and also have implications for the design of man-made, extraterrestrial vehicles and structures. Key Points The settling depth in granular media is independent of gravity The settling time scales like g-1/2 Layering driven by granular sedimentation should be similar © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901946112&doi=10.1002%2f2014GL059229&partnerID=40&md5=f5add2e023811772a6d9019fad544a87
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7354
Appears in Collections: 气候减缓与适应
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作者单位: Henri Poincarè Group of Complex Systems, Physics Faculty, University of Havana, Havana, Cuba
Recommended Citation:
Altshuler E.,Torres H.,González-Pita A.,et al. Settling into dry granular media in different gravities[J]. Geophysical Research Letters,2014-01-01,41(9).