... by vortex structures. Direct numerical simulations (DNS) are performed for this problem. Horizontal vortex tube and vortex ring are defined as two canonical problems for laminar free surface vortex connection problems. Particularly, the vortex structure free-surface evolution and surface secondary vorticity...

.... scully wind turbine leishman correction wind energy simulation wake method vortex ring wake trajectory subsea system curved filament correction renewable energy tip vortex wake govindarajan vortex core model vortex segment collocation point assumption Study of free vortex wake method...

... directly (Tangorra, et al, 2010, 2011). As the thrust efficiency and self-propulsive swimming speed are commonly considered as important metrics for design criteria of the man-made machine (Tytell, 2007). locomotion vortex ring mackerel vortice robotic fish strouhal number thrust force...

... (Particle Image Velocimetory) measurement. A jellyfish is principally propelled by a jet at the contracting phase of a jellyfish motion. If that is true, it is interesting that a jellyfish never stops traveling even at the expanding phase. We found that a vortex ring with the opposite vorticity to shed...

... surface on the dynamics of body-generated vortices and on the vortical component of hydrodynamic force acting on the body. For example, a rapid radial transport of body-generated vortex rings, accompanied by breaking of a short wave by local instability, is observed in the case of shallow submergence...

... circulation collapse phase jet tip velocity fluid mech vortex ring bubble surface liquid jet inception centre point expansion phase rigid wall rigid boundary evolution expansion toroidal bubble representation cavitation bubble ABSTRACT: A numerical study is carried out...

... modification. By means of numerical computations, the refraction processes of solitary waves over an isolated vortex ring and two kinds of topography, mainly a plane slope and a submerged circular shoal, with or without currents are shown and a series of refraction properties, such as fission of solitary waves...