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随着水质恶化,底泥悬浮对水质的重要影响受到极大地关注.计算机的迅速发展为数值模拟底泥运动与再悬浮研究提供了可靠手段.利用连续性方程和N-S方程模拟流体质点运动,采用VOF法追踪自由面和水-泥沙水的相界面运动,建立了空气-水-高浓度泥沙水的数值波浪水槽,实现了波浪作用下的流场动力学响应模拟.利用波谱分析手段,分析了流场中表面波和内波耦合波场的波动特性,提出了小幅值线性波动场的计算方法.
With the deterioration of water quality, the significant impact of sediment suspension on water quality has drawn great attention.The rapid development of computer has provided a reliable method for the numerical simulation of sediment movement and resuspension.Using the continuity equation and NS equation to simulate the fluid particle motion, VOF method was used to track the interface movement of free surface and water-sediment water, and the numerical wave tank with air-water-high concentration sediment was established to simulate the flow field dynamics under wave action.Using spectral analysis, The wave characteristics of coupled wave fields of surface wave and inner wave in the flow field are analyzed, and the calculation method of small amplitude linear wave field is proposed.