Author(s): Martin Petkovsek; Peter Gregorcic; Matej Hocevar; Juan Manuel Rossello

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Abstract: In this work, we studied the interaction between cavitation and laser-functionalized surfaces on two complexity levels. Firstly, the cavitating flow behind the functionalized cylindrical surfaces was observed and secondly, a more detailed study of individual laser-induced bubbles and flat laser-functionalized surfaces was performed. The cavitating flow behind the cylinders reveals that the surface topography can influence the cavitation dynamics which may have a potential impact on the cavitation erosion, while experiments with single cavitation bubbles against flat, textured surfaces provide more details about the responsible mechanisms. The research focused on investigating the collapse behaviour of bubbles on different laser textured surfaces that were in both hydrophobic and hydrophilic states. It was found that hydrophobicity generally causes the microjet to be deflected away from the surface and that the topography itself influences the rebounds of the collapsing bubbles.

DOI: https://doi.org/10.1088/1755-1315/1561/1/012014

Year: 2025