On the evolution of double-diffusive intrusions into a stably stratified liquid: the physics of self-propagation

1998 ◽  
Vol 41 (14) ◽  
pp. 2113-2124 ◽  
Author(s):  
Henk A. Dijkstra ◽  
E.Jurjen Kranenborg
Keyword(s):  
Double Diffusive ◽  
Stratified Liquid

On the elimination of refractive-index variations in turbulent density-stratified liquid flows

1979 ◽  
Vol 93 (1) ◽  
pp. 83-96 ◽  
Author(s):  
Trevor J. Mcdougall
Keyword(s):  
Refractive Index ◽  
Theoretical Model ◽  
Laser Doppler Anemometry ◽  
Turbulent Medium ◽  
Double Diffusive Convection ◽  
Diffusive Convection ◽  
Liquid Flows ◽  
Major Impediment ◽  
Double Diffusive ◽  
Stratified Liquid

The variations in refractive index in stratified liquid flows have been a major impediment to the use of laser-Doppler anemometry in these situations. This paper describes a method whereby these refractive-index variations can be drastically reduced while retaining the dynamically important density differences. The method uses two solutes to produce the density differences and it is shown that double-diffusive convection (of the salt-finger type) can be avoided by using a suitable pair of solutes. A theoretical model of the lateral wander of a single laser beam propagating through a turbulent medium is developed and this explains the success of the method.

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