Wave drag on floating bodies.
basic_science · Level V
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- Record sourced from PubMed, PMID 21876186.
- Also identified by DOI 10.1073/pnas.1106662108 and PMC identifier 3174664.
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Abstract
We measure the deceleration of liquid nitrogen drops floating at the surface of a liquid bath. On water, the friction force is found to be about 10 to 100 times larger than on a solid substrate, which is shown to arise from wave resistance. We investigate the influence of the bath viscosity and show that the dissipation decreases as the viscosity is increased, owing to wave damping. The measured resistance is well predicted by a model imposing a vertical force (i.e., the drop weight) on a finite area, as long as the wake can be considered stationary.