摘要
为了研究沙纹形成的本质原因,通过室内水槽实验的研究方式,重点研究了沙纹的二维几何特征形态与水流强度的关系。通过实验分析以及数值拟合,得到在一定水流和沙粒粒径的条件下,存在一个优势沙纹的分布区间,且沙纹的波高、波长也与水流强度存在一定的关系。研究认为,无量纲化后的波高、波长值与水流强度Fr无直接的函数关系,而与Re*存在指数关系。
In order to explore the cause of sand ripple formation, the direct relationship between the 2D geometry characteris- tics of sand ripple and flow intensity is analyzed through the flume experiment in the laboratory. By the experiment analysis and numerical simulation, it is found that under certain conditions of flow and sand diameter, there is a dominant ripple distribution zone in the flume, and there is certain relationship among ripple length, height and flow intensity as well. It is shown that the di- mensionless ripple height, length are not directly related to flow intensity, however, there is exponential relationship between di- mensionless ripple height, length and Re..
出处
《人民长江》
北大核心
2013年第5期61-65,共5页
Yangtze River
基金
国家自然基金资助项目(50909036)
水文水资源及水利工程科学国家重点实验室基本科研业务费自主研究项目(201158572)
关键词
波高
波长
优势沙纹
水流强度
ripple height
ripple length
dominant ripple
flow intensity
