Thanks to San Diego Zoo, we have this underwater filming of flamingo's feeding pattern. There is an attempt to explain it here
Why do we care? Because we want to know how flamingo have chosen their frequency of pressure fluctuations to get (probably) the maximum feeding rate. They control the resuspension rate and care about complete detachment from the surface, rather than just rolling or sliding their food. In the first video, we see quite large particles.
We work on the resuspension for quite some time. We did the resuspension of freely moving particles using 3D-PTV in Hadar Traugott Master thesis https://www.sciencedirect.com/science/article/pii/S0301932215300860?via%3Dihub
We studied resuspension under a vortex with Dr. Ron Shnapp [link] and then proposed a model for resuspension on rough surfaces in this work https://www.sciencedirect.com/science/article/pii/S0009250915002298?via%3Dihub
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