论文部分内容阅读
为研究波浪在泥质海床上的波高衰减,该文利用不可压缩流体的基本方程建立了波浪作用下水和底泥耦合运动的数值模型,模型能适应各种形式的底泥本构关系。控制方程组采用有限体积法求解,自由表面和水与泥层的界面采用VOF方法模拟。通过对比研究黏性模型和黏弹塑性模型对于底泥引起波浪衰减现象的有效性表明,当底泥密度较小时,黏性模型可以较好地模拟底泥引起的波浪衰减,但底泥密度较大时,其塑性特征不能忽视,采用更具一般性的黏弹塑性模型才能较好地反映波浪衰减的趋势。
In order to study the wave height attenuation of wave on the shady seabed, a numerical model of coupled movement of water and sediment under wave action is established by using the basic equations of incompressible fluid. The model can adapt to various forms of sediment constitutive relationship. The governing equations are solved by finite volume method. The interface between free surface and water and mud layer is modeled by VOF method. By comparing the viscous model and the viscoelasto-plastic model, the effectiveness of sediment-induced wave decay phenomenon shows that when the sediment density is small, the viscous model can better simulate the wave decay caused by sediment, but the sediment density is lower Its plasticity can not be neglected. The more general viscoelastic-plastic model can reflect the trend of wave attenuation well.