IMECH-IR  > 力学所知识产出(1956-2008)
床面附近泥沙运动的分析
Alternative TitleAnalysis of near-bed sediment motion
刘青泉; 周济福; 舒安平
Source Publication水科学进展
2003
Volume14Issue:5Pages:569-575
ISSN1001-6791
Abstract基于水、沙两相的分相测量试验结果,分析了床面附近泥沙颗粒的脉动和力学特性,指出床面附近的泥沙运动有着特殊的力学机制:颗粒相具有较强的非湍流脉动,其产生的脉动力对颗粒的运动起着重要作用。论述了沙粒在水流中从推移运动到扬起悬浮的物理过程,讨论了过去闰些理论中存在的问题和不足,概括了泥沙颗粒在水流中从床面扬起的基本模式,运用两相流理论分析了沙粒在水流中扬起的动力学机理。根据颗粒运动的垂向动量平衡原理,对泥沙颗粒的垂向浓度分布规律作了新的分析解释。证实了除浓度梯度之外,颗粒相的垂向脉动强度梯度也是泥沙扩散的重要扩散势,进一步揭示了悬移质浓度垂线分帛存在两种类型的内在机理。
Keyword床面 颗粒脉动 扬动 扩散 浓度分布 泥沙运动
Subject Area力学
Indexed ByCSCD
Language中文
CSCD IDCSCD:1231490
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/17488
Collection力学所知识产出(1956-2008)
Recommended Citation
GB/T 7714
刘青泉,周济福,舒安平. 床面附近泥沙运动的分析[J]. 水科学进展,2003,14,5,:569-575.
APA 刘青泉,周济福,&舒安平.(2003).床面附近泥沙运动的分析.水科学进展,14(5),569-575.
MLA 刘青泉,et al."床面附近泥沙运动的分析".水科学进展 14.5(2003):569-575.
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