title: Wave drag on floating bodies.
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.
authors.affiliation: Ladhyx, Unité Mixte de Recherche 7646, Centre National de la Recherche Scientifique-École Polytechnique, 91120 Palaiseau, France. marie.le-merrer@polytechnique.org
authors.forename: Marie
authors.initials: M
authors.lastname: Le Merrer
authors.forename: Christophe
authors.initials: C
authors.lastname: Clanet
authors.forename: David
authors.initials: D
authors.lastname: Quéré
authors.forename: Elie
authors.initials: E
authors.lastname: Raphaël
authors.forename: Frédéric
authors.initials: F
authors.lastname: Chevy