Numerical Study of Laminar Vortex Breakdown in a Diverging Tube Apparatus
Author : Daryl O. Snyder
Publisher :
Page : 124 pages
File Size : 50,67 MB
Release : 1999
Category : Laminar flow
ISBN :
Author : Daryl O. Snyder
Publisher :
Page : 124 pages
File Size : 50,67 MB
Release : 1999
Category : Laminar flow
ISBN :
Author : Kenneth E. Torrance
Publisher :
Page : 44 pages
File Size : 10,72 MB
Release : 1971
Category : Eddies
ISBN :
Author : R. M. Kopecky
Publisher :
Page : 44 pages
File Size : 15,47 MB
Release : 1971
Category : Fluid mechanics
ISBN :
Author : Robert Edward Spall
Publisher :
Page : 268 pages
File Size : 19,15 MB
Release : 1987
Category : Fluid mechanics
ISBN :
Author : Luis E. Rodrigues Castro
Publisher :
Page : 0 pages
File Size : 31,16 MB
Release : 1969
Category : Mechanical engineering
ISBN :
Author : Dario Amirante
Publisher :
Page : 186 pages
File Size : 25,78 MB
Release : 2007
Category :
ISBN :
Author : Charles Lowry Robertson
Publisher :
Page : pages
File Size : 31,87 MB
Release : 1971
Category : Mechanical engineering
ISBN :
Author : H. L. Chen
Publisher :
Page : 68 pages
File Size : 15,85 MB
Release : 1991
Category : Vortex motion
ISBN :
In the present study, generation of two vortex rings and their cut-and-connect process were numerically simulated by solving three-dimensional and time-dependent Navier-Stokes equations, under conditions similar to the laboratory experiment. In order to explain the mechanism of cut-and-connect, velocity, vorticity, pressure, helicity density and energy dissipation were examined for the flow field of the cut-and-connect of vortex rings. The present study revealed that energy dissipation is an essential process for circulation cancellation during vortex tubes cutting. Based on this energy dissipation mechanism, it is concluded that the cut-and-connect of vortex tubes may occur in the limit of inviscid flows. This conclusion is particularly important to the three-dimensional discrete vortex method for computing high Reynolds number flows. Features of helicity in the three-dimensional flow field of cut-and-connect process of vortex tubes were also investigated. The relation between the helicity density and the energy dissipation function in the three-dimensional flow field was examined.
Author : Anping Wang
Publisher :
Page : 190 pages
File Size : 16,96 MB
Release : 1994
Category :
ISBN :
Author : Christopher R. Anderson
Publisher : Springer
Page : 150 pages
File Size : 15,9 MB
Release : 2006-11-14
Category : Mathematics
ISBN : 3540460349