A particle-free stereo-video free-surface reconstruction method for wave-tank experiments

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Experiments in Fluids Pub Date : 2024-10-18 DOI:10.1007/s00348-024-03887-w

Sacha Le Page, Alan Tassin, Julien Caverne, Guillaume Ducrozet

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Abstract

This paper introduces a new stereo-video-based free-surface reconstruction system developed for wave-tank experiments. The originality of the proposed approach relies on the use of short water waves and an adapted lighting system to create a fine texture suitable for the cross-correlation of the stereo image pairs. The feasibility of the approach is demonstrated experimentally in a wave flume. The accuracy of the stereo-video free-surface reconstruction method is assessed through comparisons with measurements performed with a servo-controlled wave gauge. The reconstruction of the free surface at rest and during different regular (periodic) long-crested wave experiments are considered for this purpose. The results demonstrate that, with a suitable free-surface roughness, the accuracy of the stereo-system can be similar to the accuracy of the wave gauge. The accuracy, the simplicity and the flexibility of the approach, which does not necessitate any seeding or dying of the water, nor the use of a laser light source, make it a promising measurement technique for water-wave experiments.

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用于波箱实验的无颗粒立体视频自由表面重建方法

本文介绍了一种新的基于立体视频的自由表面重建系统，该系统是为波浪槽实验而开发的。所提方法的独创性在于利用短水波和经调整的照明系统来创建适合立体图像对交叉相关的精细纹理。该方法的可行性在波浪水槽中进行了实验验证。通过与使用伺服控制波浪仪进行的测量进行比较，评估了立体视频自由表面重建方法的准确性。为此，考虑了静止时和不同规则（周期）长波试验期间的自由表面重建。结果表明，在自由表面粗糙度合适的情况下，立体系统的精度与波浪仪的精度相近。这种方法精确、简单、灵活，不需要对水进行任何播种或染色，也不需要使用激光光源，因此是一种很有前途的水波实验测量技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experiments in Fluids 工程技术-工程：机械

CiteScore

5.10

自引率

12.50%

发文量

157

审稿时长

3.8 months

期刊介绍： Experiments in Fluids examines the advancement, extension, and improvement of new techniques of flow measurement. The journal also publishes contributions that employ existing experimental techniques to gain an understanding of the underlying flow physics in the areas of turbulence, aerodynamics, hydrodynamics, convective heat transfer, combustion, turbomachinery, multi-phase flows, and chemical, biological and geological flows. In addition, readers will find papers that report on investigations combining experimental and analytical/numerical approaches.