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| 1 | 波浪场中物质输移离散系数的理论分析显示文摘海岸水域波浪引起的物质输移扩散存在着不同于水流引起的物质输移扩散的特征.通过解析的方法对垂向扩散方程进行求解,推导出波浪和潮流共同作用下的海岸水域物质输移离散系数的理论公式.分析中将总的离散系数分为潮流、质量输移流、纯波浪波动作用以及潮流与质量输移流、潮流与波浪波动、质量输移流与波浪波动的相互作用6部分,通过分析各组成部分特征,得出海岸水域物质输移中波浪所产生的离散效应主要是质量输移流贡献,波浪水质点运动及波流相互作用对时间平均离散系数的贡献较小的结论.仅波浪的作用(不包括潮流)的有关结果与他人数值模拟和实验结果的吻合良好,证明了该理论推导的正确性.给出了时间平均离散系数及离散系数波动幅值随波浪周期和波高的变化特征,同时将结果应用于垂向环流,给出了垂向环流对应于质量输移流所产生的离散系数的特征. | 沈良朵 邹志利 | 2011 | 力学学报2011，43，6： | 0 |
| 2 | Study and verification on dispersion coefficient in wave field显示文摘Transport and diffusion caused by coastal waves have different characteristics from those induced by flows. Through solving the vertical diffusion equation by an analytic method, this paper infers a theoretical formula of dispersion coefficient under the combined action of current and waves. It divides the general dispersion coefficient into six parts, including coefficients due to tidal current, Stokes drift, wave oscillation and interaction among them. It draws a conclusion that the contribution of dispersive effect induced by coastal waves is mainly produced by Stokes drift, while the contributions to time-averaged dispersion coefficient due to wave orbital motion and interaction between current and waves are very small. The results without tidal current are in agreement with the numerical and experimental results, which proves the correctness of the theoretical derivation. This paper introduces the variation characteristics of both the time-averaged and oscillating dispersion coefficients versus relative water depth, and demonstrates the physical implications of the oscillating mixing coefficient due to waves. We also apply the results to the costal vertical circulation and give its characteristics compared to Stokes drift. | SHEN LiangDuo ZOU ZhiLi | 2012 | Science China(Technological Sciences)2012，55，5： | 0 |
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