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Numerical simulation of linear water waves and wave-structure interaction

机译：线性水波与波结构相互作用的数值模拟

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One of the main stages in the design of wave energy converters (WEC's) is the numerical modelling of a given converter. In this paper, the numerical simulation of both linear deep water waves and linear waves for the finite depth case are explored using computational fluid dynamics (CFD), to aid in this design stage. The CFD software package described in this paper is the commercial finite volume package ANSYS CFX (Release 12.1). The results of parametric studies, which were performed in order to optimise the CFD model, are detailed and a guide to creating a model that produces the desired waves is presented. The model was validated in two ways: (a) the wave created was compared to wavemaker theory (WMT) and (b) the water particle velocity and elevation of the wave was compared to linear. Airy, wave theory (LWT) for deep water waves. It was also found that wave generation in ANSYS CFX using a flap-type wavemaker was restricted to a low normalised wavenumber, k_0h. In order to increase this restriction, the hinge of the wavemaker was raised and, with this alteration, it is possible to generate deep water linear waves. A case study of a real world application of wave-structure interaction, employing this methodology, is also explored.
机译：波浪能转换器（WEC）设计的主要阶段之一是给定转换器的数值建模。在本文中，利用计算流体力学（CFD）探索了线性深水波和有限深度情况下的线性波的数值模拟，以帮助进行此设计阶段。本文介绍的CFD软件包是商业有限体积软件包ANSYS CFX（版本12.1）。为了优化CFD模型而进行的参数研究的结果得到了详细介绍，并给出了创建产生所需波的模型的指南。通过两种方式验证了该模型：（a）将产生的波浪与造浪理论（WMT）进行比较，（b）将水的粒子速度和波浪高程与线性进行比较。适用于深水波的通风波理论（LWT）。还发现在ANSYS CFX中使用襟翼型波发生器产生的波被限制在低归一化波数k_0h处。为了增加该限制，升高了造波器的铰链，并且通过这种改变，可以产生深水线性波。还探讨了使用这种方法对波结构相互作用进行实际应用的案例研究。

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