Shadowgraph Visualization of Turbulent Exchange between a Vortex Ring and the Environment at Different Densities of the Fluid in the Vortex Interior and Exterior

2019 ◽  
Vol 45 (4) ◽  
pp. 314-316 ◽  
Author(s):  
V. V. Nikulin
Keyword(s):  
Vortex Ring ◽  
Turbulent Exchange

scholarly journals Теневая визуализация турбулентного обмена между вихревым кольцом и окружающей средой при различных плотностях жидкостей в вихре и вне его

2019 ◽  
Vol 45 (7) ◽  
pp. 8
Author(s):  
В.В. Никулин
Keyword(s):  
Reynolds Number ◽  
Vortex Ring ◽  
Turbulent Exchange ◽  
Characteristic Distance ◽  
Vortex Velocity

AbstractThe turbulent exchange between a vortex ring and the environment was observed using shadowgraph imaging of the process when the density of the fluid inside and outside of the vortex is different. The characteristic distance of turbulent exchange traversed by the vortex is determined, and the dependence of this distance on the vortex velocity and the related Reynolds number is established.

Two interacting vortex ring pairs and their sound generation

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 79-86 ◽  
Author(s):  
N. W. M. Ko ◽  
R. C. K. Leung ◽  
K. Lam
Keyword(s):  
Vortex Ring ◽  
Sound Generation

Vortex Ring Generator

1998 ◽  
Author(s):  
George Lucey ◽  
Louis Jasper
Keyword(s):  
Vortex Ring

Motion of a Large Dusty Buoyant Thermal With a Vortex Ring

1978 ◽  
Vol 45 (4) ◽  
pp. 711-716 ◽  
Author(s):  
Stephen S.-H. Chang
Keyword(s):  
Numerical Solution ◽  
Vortex Ring ◽  
Excellent Agreement ◽  
Spherical Particles ◽  
System Of Equations ◽  
Inhomogeneous Atmosphere

This paper presents a method for computing the motion and decay of a large dusty, buoyant thermal (cloud) carried by a vortex ring generated from a strong near ground explosion and ascending in an inhomogeneous atmosphere. A system of equations is derived describing the motion of the vortex ring, the thermal, and the pollutants which consist of numerous solid spherical particles. The interior properties and the trajectories of the thermal and the pollutants are obtained. The numerical solution for the thermal trajectory is in excellent agreement with experiment.

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