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An incompressible smoothed particle hydrodynamics (ISPH) wave basin with structure interaction for fully nonlinear and extreme coastal waves

具有结构相互作用的不可压缩平滑粒子流体动力学 (ISPH) 波池，适用于完全非线性和极端沿海波浪

基本信息

批准号：
EP/H018638/1
负责人：
Peter Stansby
金额：
$ 23.46万
依托单位：
University of Manchester
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2010
资助国家：
英国
起止时间：
2010 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FH018638%2F1
关键词：
incompressible smoothed particle hydrodynamics ISPH

项目摘要

In coastal and offshore engineering, complex, generally highly nonlinear and distorted, wavemotion, which may involve breaking, bore propagation, aeration, structure interaction and violent impact, has remained largely intractable to numerical modelling. Smoothed particle hydrodynamics (SPH) holds great promise since it solves the governing equations in Lagrangian form where each particle represents an interpolation of local fluid quantities that carry flow quantities such as mass, pressure, velocity and move according to their underlying mechanics. SPH is thus a meshless method and possesses some unique advantages over conventional mesh-based approaches; no explicit treatment of the free surface and no computational grid mean that sophisticated meshing is not needed for complex fluid or solid geometries. The method is advancing rapidly, both in fundamental development and in its range of applications. An SPH approach has been developed which is truly incompressible, accurate and virtually noise free but, until recently, numerical instability has been a difficulty. This has been solved by a recent development at Manchester which maintains accuracy, efficiency and relative simplicity. The noise-free aspect is important for fluid/structure interaction since noisy pressures would contaminate forces. The effects of trapped air on impact pressures is also known to be important and surface tension determines the nature of wave breaking. These two effects may be incorporated in SPH. The aim of this project is to make the ISPH method into an attractive engineering tool, with the code able to handle very large numbers of particles, particularly in 3-D, using parallel computing to enable a wide range of applications. This would be undertaken at three levels as: a single-phase incompressible, almost inviscid flow solver; a two-phase water/air solver, with air compressible; a two-phase water/air solver with surface tensionTo this end a 3-D numerical coastal wave basin will be developed with the option of including structures of arbitrary geometry such as sea walls, caissons, wind turbine columns, harbours, ships.

在海岸和近海工程中，波浪运动是复杂的、通常是高度非线性和扭曲的，它可能涉及破裂、钻孔传播、曝气、结构相互作用和剧烈冲击，在很大程度上仍然是数值模拟的难题。光滑粒子流体力学(SPH)具有很大的应用前景，因为它以拉格朗日形式求解控制方程，其中每个粒子表示局部流体量的内插，这些局部流体量携带诸如质量、压力、速度和根据其基本力学而运动的流动量。因此，SPH是一种无网格方法，与传统的基于网格的方法相比具有一些独特的优点；自由表面不需要显式处理，也不需要计算网格，这意味着对于复杂的流体或固体几何形状不需要复杂的网格划分。该方法在基础开发和应用范围方面都取得了快速进展。一种真正不可压缩、精确且几乎无噪声的SPH方法已经被开发出来，但直到最近，数值不稳定性一直是一个困难。曼彻斯特最近的一项发展解决了这个问题，它保持了准确性、效率和相对简单。无噪声方面对于流体/结构相互作用很重要，因为有噪声的压力会污染作用力。众所周知，滞留空气对冲击压力的影响也很重要，表面张力决定了波浪破碎的性质。这两种效应可以合并到SPH中。该项目的目的是使ISPH方法成为一种有吸引力的工程工具，其代码能够处理非常大量的粒子，特别是在3-D中，使用并行计算实现广泛的应用。这将在三个层面上进行：单相不可压缩、几乎无粘流解算器；两相水/空气解算器，空气可压缩；两相水/空气解算器，表面张力；为此目的，将开发一个三维沿海数值波浪盆地，可选择包括任意几何形状的结构，如海堤、沉箱、风力涡轮机柱、港口、船舶。