Experimental Investigation of Air Bubble Curtain Effects on Water Wave Field

This paper studies the effects of an air bubble curtain on surface water waves. Water particle velocities and free surface elevations were measured simultaneously at two cross-shore locations downstream of the air bubble curtain. Measurements were carried out for regular waves using different air bu...

Full description

Saved in:
Bibliographic Details
Published inDiffusion and defect data. Solid state data. Pt. A, Defect and diffusion forum Vol. 415; pp. 81 - 99
Main Authors Neves, Diogo R.C.B., Brito, Moisés, Pires-Silva, António Alberto, Fortes, Conceição Juana, Matos, Jorge
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 27.04.2022
Subjects
Air bubbles
Air flow
Curtains
Energy spectra
Fluid dynamics
Free surfaces
Surface water
Turbulence intensity
Turbulent flow
Velocity distribution
Water waves
Air Bubble Curtain
Wave Propagation
Wave Flume
Flow Velocities
Online AccessGet full text

Cover

More Information
Summary:This paper studies the effects of an air bubble curtain on surface water waves. Water particle velocities and free surface elevations were measured simultaneously at two cross-shore locations downstream of the air bubble curtain. Measurements were carried out for regular waves using different air bubble curtain configurations. Free surface elevations were measured using resistive gauges and the instantaneous velocities were acquired using an Acoustic Doppler Velocimeter (ADV). The characteristics of the free surface elevation time series, velocity field and turbulence are analyzed and discussed. The free surface elevation was found to be attenuated by the air bubble curtains. The phase averaged velocity profiles also depict the effect of the air bubbles in the flow field by generating milder longitudinal velocities (u) and by increasing the transverse component of the velocity (w). The increase in the turbulence intensity and the different energy spectrum produced by the air bubble curtain is also observed. The experimental results indicate that the thickness of the air bubble curtain and the total air flow rate affects the wave field.
ISSN:1012-0386
1662-9507
1662-9507
DOI:10.4028/p-9jm010