Multi-phase SPH-FDM and experimental investigations on the hydrodynamics of an oscillating water column wave energy device

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL Coastal Engineering Pub Date : 2024-07-01 DOI:10.1016/j.coastaleng.2024.104569

Fang He , Haonan Jiang , Yuan Lin , Jiapeng Pan , Yifan Zhang , Can Huang

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Abstract

In this paper, the hydrodynamic performance of a bottom-seated type oscillating water column (OWC) device is investigated by numerical and experimental methods. A coupled SPH (Smoothed Particle Hydrodynamics) - FDM (Finite Difference Method) is proposed to simulate the interaction between waves and the OWC device. The current SPH-FDM model improves grid encryption method, and expand the single-phase SPH-FDM to multiphase SPH-FDM. The results from SPH-FDM align closely with those from the published experimental measurements. Following the successful validations, SPH-FDM and experiment are employed for a series of simulations to investigate the performance of the OWC device. Compared to experimental method, SPH-FDM can obtain global flow field information and avoid the influence of free surface identification and capillarity on vortex determination. In addition, SPH-FDM can naturally captures free surfaces, so it supports further studies on the non-uniformity of water surface in the chamber of OWC which cannot be studied by PIV or pneumatic model.

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振荡水柱波能装置的多相 SPH-FDM 和流体力学实验研究

本文通过数值和实验方法研究了底座式振荡水柱（OWC）装置的水动力性能。提出了一种耦合 SPH（平滑粒子流体力学）- FDM（有限差分法）来模拟波浪与 OWC 装置之间的相互作用。当前的 SPH-FDM 模型改进了网格加密方法，并将单相 SPH-FDM 扩展到多相 SPH-FDM。SPH-FDM 的结果与已公布的实验测量结果非常吻合。验证成功后，SPH-FDM 和实验被用于一系列模拟，以研究 OWC 设备的性能。与实验方法相比，SPH-FDM 可以获得全局流场信息，避免了自由表面识别和毛细现象对涡流判断的影响。此外，SPH-FDM 能够自然捕捉自由表面，因此有助于进一步研究 PIV 或气动模型无法研究的 OWC 室中水面的不均匀性。

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来源期刊

Coastal Engineering 工程技术-工程：大洋

CiteScore

9.20

自引率

13.60%

发文量

审稿时长

3.5 months

期刊介绍： Coastal Engineering is an international medium for coastal engineers and scientists. Combining practical applications with modern technological and scientific approaches, such as mathematical and numerical modelling, laboratory and field observations and experiments, it publishes fundamental studies as well as case studies on the following aspects of coastal, harbour and offshore engineering: waves, currents and sediment transport; coastal, estuarine and offshore morphology; technical and functional design of coastal and harbour structures; morphological and environmental impact of coastal, harbour and offshore structures.