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该文基于Open FOAM开源程序包建立波浪数值水槽,对孤立波在斜坡上的水动力特性进行模拟。运用实验数据验证了数学模型的精度和可靠性,进一步研究岸滩剖面变化的成因,并分析冲刷区不同位置泥沙颗粒所受水流冲量的变化规律,发现地形冲刷变化与水流的冲量作用为正相关,回落过程中水流冲量大于上爬过程,因而冲刷主要发生在回落过程。探讨淤积区泥沙颗粒的受力特征,发现由于水跃过程中漩涡作用,中层水流的泥沙颗粒出现向上受力,泥沙颗粒由底部回落水流向上部水流转移,水跃后期泥沙颗粒受力方向为向岸向下,岸滩最大淤积位置出现在水跃中水体涡量最大时的临近向岸区域。
Based on Open FOAM open source package, a wave numerical reservoir is established to simulate the hydrodynamic characteristics of isolated waves on slopes. The experimental data verify the accuracy and reliability of the mathematical model to further study the causes of bank profile changes and analyze the variation of sediment particles in different locations affected by the impulse of water impulse. It is found that the impact of terrain erosion and water impulse is positive Correlation, the process of falling off the flow impulse greater than the climbing process, so the erosion occurred mainly in the fall process. It is found that due to the vortex effect in the process of water jump, the sediment particles in the middle layer of water flow upward, and the sediment particles migrate from the bottom falling water to the upper part of the water flow. The sediment particles in the late stage of the water jump The direction of the force is downward to the shore, and the largest depositional position of the shore beach appears near the shore area when the water vorticity is the largest in the water jump.