论文标题
水下巴尔chans的二元相互作用的全面图片
A comprehensive picture for binary interactions of subaqueous barchans
论文作者
论文摘要
我们通过实验研究了两个水下巴尔奇人之间发生的短距离相互作用。实验是在透明材料的水通道中进行的，其中将受控的晶粒倒入其中，并放置在床形的顶部获得的图像上。我们改变了晶粒类型（直径，密度和圆度），桩质量，横向距离，水流速和初始条件。结果，针对对齐和不中心的配置确定了五种不同的模式，我们提出的相互作用图基本上取决于每个沙丘的晶粒数量，盾牌数量和Barchans的比对。此外，我们还表明了实验迹象表明，在某些情况下，弹出的Barchan具有大致相同的影响，并且在尾流的过程中，下游沙丘的不对称性很大。目前的结果阐明了在地球和其他行星上发现的Barchans的尺寸调节。
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.
