Advances in research on turbulence structure in vegetated open channel flows
Advances in research on turbulence structure in vegetated open channel flows
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发表时间：
2014
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通讯作者：
Yan Jin
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作者：
Yan Jin
天然河流中的水生植物对湍动结构有重要影响。在植被存在的情况下，河流水流变得更加强烈的混合，其湍流结构更加复杂。植物覆盖明渠水流的湍动特性直接影响着泥沙、污染物和营养盐的输运，近年来已有许多研究对其进行了研究。本文从植物流的时均湍流特性、拟序结构、流型以及影响湍流结构的相关因素等方面对前人的研究进行了综述。建议采用场信息和点信息相结合的分析方法，定量描述拟序结构的形成和发展过程，探讨植被流的湍流机制，为进一步研究奠定基础。
Aquatic plants in natural rivers have important effects on turbulence structure. In the presence of vegetation,river flows become more intensely mixed and their turbulent structures are more complicated. Many studies have been conducted recently to examine turbulence characteristics of vegetated open channel flows,which directly affect the transport of sediment,pollutants and nutrients. This work provides a review of the previous studies in the context of time-average turbulent characteristics,coherent structure,flow regime and relevant factors that influence the turbulence structure in vegetated flows. It is suggested that a combined analysis of field and point information is applied to quantitatively describe the formation and development process of coherent structure,and to explore the turbulence mechanism of vegetated flows for the further study.