气候变化领域集成服务门户(CCPortal): A Comprehensive Picture for Binary Interactions of Subaqueous Barchans

CCPortal

DOI	10.1029/2020GL089464
	A Comprehensive Picture for Binary Interactions of Subaqueous Barchans
	Assis W.R.; Franklin E.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	We investigate experimentally the short-range interactions occurring between two subaqueous barchans. The experiments were conducted in a water channel of transparent material where controlled grains were poured inside, and a camera placed on the top acquired images of the bedforms. We varied the grain types (diameter, density, and roundness), pile masses, transverse distances, water flow rates, and initial conditions. As a result, five different patterns were identified for both aligned and off-centered configurations, and we propose interaction maps that depend basically on the ratio between the number of grains of each dune, Shields number, and alignment of barchans. In addition, we show experimental indications that an ejected barchan has roughly the same mass of the impacting one in some cases and that in wake-dominated processes the asymmetry of the downstream dune is large. The present results shed light on the size regulation of barchans found on Earth and other planets. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Flow of water; Binary interactions; Initial conditions; Interaction maps; Short range interactions; Size regulation; Transparent material; Water channels; Water flow rate; Piles; asymmetry; barchan; bedform; dune; experimental study; grain size; wake
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169699
作者单位	School of Mechanical Engineering, University of Campinas, Campinas, Brazil
推荐引用方式 GB/T 7714	Assis W.R.,Franklin E.M.. A Comprehensive Picture for Binary Interactions of Subaqueous Barchans[J],2020,47(18).
APA	Assis W.R.,&Franklin E.M..(2020).A Comprehensive Picture for Binary Interactions of Subaqueous Barchans.Geophysical Research Letters,47(18).
MLA	Assis W.R.,et al."A Comprehensive Picture for Binary Interactions of Subaqueous Barchans".Geophysical Research Letters 47.18(2020).