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.

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...

We presume that plane strain state of deformation prevails when the interior of a long gun barrell or a cylindrical pressure vessel is dynamically loaded. The viscoplastic material of the body-is taken to exhibit strain-rate hardening and thermal softening. Two thin ellipsoidal voids located symmetrically on the horizontal axis and near the center of the cylinder wall act as nuclei for the init...

Two commercial Navier-Stokes solvers are applied to wave-wave and wave-structure interaction problems leading to the final application of simulating a single float of the wave energy converter (WEC) Manchester Bobber in extreme waves and a fixed section of the Pelamis in regular waves. First the two software packages CFX and STAR CCM+ are validated against measured results from physical tank te...

An extensive experimental investigation into the segregation phenomenon of suspended particles in a rotating fluid-filled horizontal cylinder is presented as well as a theoretical approach to the underlying physics, based on the assumptions of small Ekman and Rossby numbers. The theoretical predictions agree well with experimental findings. The influence of non-linearity and viscosity on the ph...

in this paper, it has been shown that there is a special relation between horizontal and vertical gradients of gravity data and the vertical and horizontal components of magnetic data for some of 2-d sources. it has been shown that the hilbert transform is useful in calculating the vertical gradient of gravity and magnetic anomalies from the horizontal gradient for transformation of gravity and...