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Open AccessArticle

On the Estimation of the Surface Elevation of Regular and Irregular Waves Using the Velocity Field of Bubbles

1
Instituto de Ingeniería, Universidad Nacional Autónoma de México, Cd. Universitaria, CdMx 04510, Mexico
2
School of Architecture, Computing & Engineering, University of East London, Docklands Campus, 4–6 University Way, London E16 2RD, UK
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2020, 8(2), 88; https://doi.org/10.3390/jmse8020088
Received: 30 December 2019 / Revised: 29 January 2020 / Accepted: 29 January 2020 / Published: 2 February 2020
(This article belongs to the Special Issue Signals and Images in Sea Technologies)
This paper describes a new set of experiments focused on estimating time series of the free surface elevation of water (FSEW) from velocities recorded by submerged air bubbles under regular and irregular waves using a low-cost non-intrusive technique. The main purpose is to compute wave heights and periods using time series of velocities recorded at any depth. The velocities were taken from the tracking of a bubble curtain with only one high-speed digital video camera and a bubble generator. These experiments eliminate the need of intrusive instruments while the methodology can also be applied if the free surface is not visible or even if only part of the depth can be recorded. The estimation of the FSEW was successful for regular waves and reasonably accurate for irregular waves. Moreover, the algorithm to reconstruct the FSEW showed better results for larger wave amplitudes. View Full-Text
Keywords: free surface recording; waves; bubbles; PIV; wave flume experiments free surface recording; waves; bubbles; PIV; wave flume experiments
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MDPI and ACS Style

Vargas, D.; Jayaratne, R.; Mendoza, E.; Silva, R. On the Estimation of the Surface Elevation of Regular and Irregular Waves Using the Velocity Field of Bubbles. J. Mar. Sci. Eng. 2020, 8, 88.

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