波浪变形数值模拟研究
首发时间:2008-06-20
摘要:波浪变形是海洋中常见的自然现象,研究波浪变形,探索波浪变形的内在机理,了解波浪变形的一般规律,对许多实际工程问题,如工程结构波浪荷载、海岸泥沙运动、港口口门区泥沙运动、河口污染物扩散等,具有重要的现实意义。有不少学者已经对此进行了大量的研究,但仅仅是对最大爬高进行了验证,对完整过程的验证比较少见。本文基于N-S方程建立了波浪数值水槽模型,利用具有二阶精度的VOF自由面重构技术,模拟了在沿程水深保持不变的情况下,孤立波在缓坡海滩上完整的运动过程。当孤立波接近海岸时,波高随水深减小迅速增大,以至波浪破碎,随之以及水流的回落现象都得到了较好的模拟与验证。
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The research in numerical simulation of wave deformation
Abstract:The wave deformation is a common phenomenon. Studying the mechanism and general rules of wave deformation plays an important role in wave loads on structure, sediment transportation in coast and in harbor and contamination diffusion. Many scholars have studied it, but only compared the maximal run-up with the experiment data, and uncommon to see the whole process. Based on Navier-Stokes equations and VOF method with two-order, this paper has simulated the run-up of breaking solitary wave on a uniform beach with a constant-depth. The wave height increases rapidly with water depth decreasing as solitary wave runs to the beach until it breaks, these phenomenon and the run-down of current have been successfully simulated and validated.
Keywords: tsunami, the run-up of solitary wave, wave deformation, the VOF method
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