为了探讨多孔介质模型是否适用于研究破碎波条件下的植物消浪问题，以立面二维自由面紊流模型为工具，建立了基于植物冠层特征的分层多孔介质模型，精细地模拟了近岸破碎波对植物带的冲击，且在瞬时波面形态、波面线、波浪最大爬高、堤脚时均压力过程线等几方面与物模试验成果进行了详细对比。结果表明，分层建体的多孔介质模型计算精度较高，能够很好地模拟植物区的消浪过程，该数值模拟方法可以用于植物消浪问题的研究。
Abstract
To testify whether the model of porous media can be applied to accurately simulate the impacts of broken waves near-shore on plants, we proposed a generalized model of porous media. The model is based on two-dimensional facade free face turbulence model. The characteristics of tree crowns were taken into consideration. Tree crowns and tree trunks were partitioned into two zones of porous media and were given different void ratios. Furthermore, the simulated results of instantaneous flow regime, wave line, maximum wave run-up value and time-averaged wave pressure on dike foot obtained from the model were compared with those of physical model test. The results were in good agreement, which indicated that the model of porous media has high accuracy in simulating the effects of counter-wave plants under the condition of broken waves.
关键词
多层建体 /
多孔介质模型 /
植物消浪 /
波面线 /
波浪爬高 /
数学模型 /
物理模型
Key words
model of multiple layers /
model of porous media /
wave attenuation by plants /
wave line /
wave run-up value /
numerical simulation /
physical model
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参考文献
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基金
国家自然科学基金面上项目(51279120);广东省水利科技创新项目(201409)
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