scholarly journals Experiments on quasi-two-dimensional dipolar vortex streets generated by a moving momentum source in a stratified fluid

2011 ◽  
Vol 60 (2) ◽  
pp. 024702
Author(s):  
Zhu Min-Hui ◽  
Wang Xiao-Qing ◽  
Chen Ke ◽  
You Yun-Xiang ◽  
Hu Tian-Qun
Keyword(s):  
Stratified Fluid ◽  
Two Dimensional ◽  
Vortex Streets

Discussion of “Two-Dimensional Buoyant Jets in Stratified Fluid”

1980 ◽  
Vol 106 (10) ◽  
pp. 1720-1720
Author(s):  
J.-C. Chen ◽  
E. J. List ◽  
P. N. Papanicolaou
Keyword(s):  
Stratified Fluid ◽  
Two Dimensional ◽  
Buoyant Jets

A viscous internal wave in a stratified fluid whose buoyancy frequency varies with altitude

1975 ◽  
Vol 69 (3) ◽  
pp. 615-624 ◽  
Author(s):  
D. Gordon ◽  
U. R. Klement ◽  
T. N. Stevenson
Keyword(s):  
Internal Wave ◽  
Small Amplitude ◽  
Wave Amplitude ◽  
Stratified Fluid ◽  
Similarity Solutions ◽  
Buoyancy Frequency ◽  
Experimental Measurements ◽  
Two Dimensional ◽  
Dimensional Theory ◽  
Curved Paths

A viscous incompressible stably stratified fluid with a buoyancy frequency which varies slowly with altitude is considered. A simple harmonic localized disturbance generates an internal wave in which the energy propagates along curved paths. Small amplitude similarity solutions are obtained for two-dimensional and axisymmetric waves. It is found that under certain conditions the wave amplitude can increase with height. The two-dimensional theory compares quite well with experimental measurements.

Withdrawal of a stratified fluid from a vertical two-dimensional duct

1975 ◽  
Vol 70 (2) ◽  
pp. 321-332 ◽  
Author(s):  
Jorg Imberger ◽  
Chris Fandry
Keyword(s):  
Number Theory ◽  
Free Surface ◽  
Froude Number ◽  
Stratified Fluid ◽  
Two Dimensional ◽  
Tank Bottom ◽  
Vertical Duct

On the basis of a small Froude number theory it is shown that previous horizontalduct models of the withdrawal of fluid from a stratified tank with a free surface and a fixed bottom are inappropriate at large times and that the flow should be modelled by that from an infinite vertical duct. The falling horizontal free surface in the tank is replaced by a vertically moving column of stratified fluid and the tank bottom is modelled by a stagnant pool of fluid below. This model is analysed and a solution uniformly valid in time is presented. The properties of the solution are then compared with existing theories and experiments.

On the stability of vortex streets in a stratified fluid

2007 ◽  
Vol 43 (6) ◽  
pp. 785-793
Author(s):  
K. A. Gorshkov ◽  
I. A. Soustova ◽  
D. A. Sergeev
Keyword(s):  
Stratified Fluid ◽  
Vortex Streets ◽  
The Stability

Two-dimensional vortex-dipole interactions in a stratified fluid

1992 ◽  
Vol 236 ◽  
pp. 665-689 ◽  
Author(s):  
S. I. Voropayev ◽  
Ya. D. Afanasyev
Keyword(s):  
Experimental Investigation ◽  
Vertical Wall ◽  
Stratified Fluid ◽  
Two Dimensional ◽  
Initial State ◽  
Vorticity Distribution ◽  
Vortex Dipoles ◽  
Dipole Interactions ◽  
Vortex Dipole ◽  
State Of Rest

Planar motion produced when a viscous fluid is forced from an initial state of rest is studied. We consider a vortex dipole produced by the action of a point force (Cantwell 1986), and a vortex quadrupole produced by the action of two equal forces of opposite direction. We also present results from an experimental investigation into the dynamics of the interactions between vortex dipoles as well as between vortex dipoles and a vertical wall in a stratified fluid. Theoretical consideration reveals that the dynamics of two-dimensional vortex-dipole interactions are determined by two main governing parameters: the dipolar intensity of the vorticity distribution (momentum) and the quadrupolar intensity of the vorticity distribution of the flow. We document details of different basic types of interactions and present a physical interpretation of the results obtained in terms of vortex multipoles: dipoles, quadrupoles and their combinations.

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