Experimental Investigation of Air Bubble Curtain Effects on Water Wave Field

Diogo R. C. B. Neves, Moisés Brito, António A. Pires-Silva, Conceição J. Fortes, Jorge Matos

Research output: Contribution to journalArticlepeer-review


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 sections downstream the air bubble curtain. Measurements were carried out for regular waves regarding 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, velocity field and turbulence are analyzed and discussed. The free surface elevation was found to be constantly attenuated by the air bubble curtain. 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 analyzed. The experimental results indicate that the thickness of the air bubble curtain and the total air flow rate affects the wave field.

Original languageEnglish
Pages (from-to)81-99
Number of pages19
JournalDefect and Diffusion Forum
Volume415 DDF
Publication statusPublished - 2022


  • Air bubble curtain
  • flow velocities
  • turbulence
  • wave flume
  • wave propagation


Dive into the research topics of 'Experimental Investigation of Air Bubble Curtain Effects on Water Wave Field'. Together they form a unique fingerprint.

Cite this