Measurements of forces on a horizontal cylinder submerged with its axis parallel to the crests of irregular waves reveal nonlinearities that cannot be attributed to diffraction or to drag loading. Laboratory experiments were undertaken using a 0.5 m diameter cylinder in waves of significant height, 1.5 m, giving maximum Keulegan Carpenter numbers of about 10. Inertia coefficients derived on a w...

Experiments have shown that when a horizontal cylinder rotates around the vertical axis in a granular medium, the drag force in the stationary regime becomes independent of the depth, in contradiction with the frictional picture stipulating that the drag should be proportional to the hydrostatic pressure. The goal of this study is to understand the origin of this depth independence of the granu...

The approach to the critical solution in leading order coating and rimming flow of a thin fluid film on a uniformly rotating horizontal cylinder is investigated. In particular, it is shown that the weight of the leading order “full-film” solution approaches its critical maximum value with logarithmically infinite slope as the volume flux approaches its critical value.

In this work, we study the role of horizontal temperature differences on top and bottom, their combined effect, relation to vertical difference in development traditional or reversed funnel-shaped vortices a rotating cylinder inhomogeneously cooled heated at bottom. These thermal inhomogeneities upper lower levels are observed formation atmospheric vortices. Our numerical results show that if i...

Abstract A comprehensive description is obtained of the two-dimensional steady gravity-driven flow with prescribed volume flux of a thin film of Newtonian fluid with temperature-dependent viscosity on a stationary horizontal cylinder. When the cylinder is uniformly hotter than the surrounding atmosphere (positive thermoviscosity) the effect of increasing the heat transfer to the surrounding atm...