| 摘要: |
| 在悬沙体积比垂向分布的研究中往往只研究悬沙体积比时均浓度分布,忽略悬沙体积比随时间的变化。而Wikramanayake悬沙模型采用时不变的紊动黏滞系数,利用奇异摄动理论中的多重尺度法分离波流作用下悬沙运动的对流扩散方程,将悬沙体积比按照时均值和周期分量进行了分析。作者在Wikramanayake悬沙模型中的周期浓度的基础上考虑了对流项的影响,从而使描述瞬时悬沙体积比的数学模型更加合理。 |
| 关键词: 波流 悬沙体积比垂向分布 时均浓度 周期分量 |
| DOI： |
| 分类号: |
| 基金项目:天津市应用基础研究计划项目(043605411) |
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| Vertical suspended sediment concentration due to wave-current flows |
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| Abstract: |
| The profiles of the suspended sediment concentration by a combined wave-current outside the surf zone are investigated in this paper. Wikramanaykeps suspended sediment concentration model is used to perform the research on vertical profiles of suspended sediment concentration under the wave-current by employing the time-invariant turbulence viscosity coefficient. The method of multiple scales in singular perturbation theory is utilized to separate the sediment convective-diffusion equation. According to different characteristics of mean suspended concentration and instantaneous suspended sediment concentration, the mean suspended concentration and the instantaneous suspended sediment concentration are analyzed and discussed. Moreover, as for the research on the instantaneous suspended concentration, the convective term is considered in order to make the vertical profiles of suspended sediment concentration more reasonable. |
| Key words: wave-current vertical profiles of suspended sediment concentration mean suspended sediment concentration instantaneous suspended sediment concentration |
