Breaking of a floating particle raft by water waves ...

• Main Authors: Saddier, Louis, Palotai, Ambre, Aksil, Matheo, Tsamados, Michel, Berhanu, Michael
• Format: Report
• Language: unknown
• Published: arXiv 2023
• Subjects: Fluid Dynamics physics.flu-dyn; Soft Condensed Matter cond-mat.soft; FOS Physical sciences; Water Bears; Sea ice
• Online Access: https://dx.doi.org/10.48550/arxiv.2310.16188; https://arxiv.org/abs/2310.16188

When particles of a few tens of microns are spread on the surface of water, they aggregate under the action of capillary forces and form a thin floating membrane, a particle raft. In a tank with a raft made of graphite powder, we generate in the laboratory gravity surface waves, whose wavelength {about 17 cm} is very large compared to the thickness of the raft {of order 10 microns}. For a sufficiently strong wave amplitude, the raft breaks up progressively by developing cracks and producing fragments whose sizes decrease on a time scale long compared to the period of the wave. We characterize the breaking mechanisms. Then, we investigate the area distribution of the fragments produced during the fragmentation process. The visual appearance of the fragments distributed in size and surrounded by open water bears a {notable} resemblance to the floes produced by the fracturing of sea ice by waves in the polar oceans. Fragmentation concepts and morphological tools built for sea ice floes can be applied to our ...