| Gravity
current: the
current is generated through the adjustement of a
fresh water lens (dyed in red) over a salty water
layer. (movie)
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Geostrophic
adjustment : a two-layer fluid (fresh/ salty water)
is set-up within an inner cylinder, the
establishment of a geostrophic current after the
removal of the outer cylinder is studied. (movie)
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| Baroclinic
instability: with the same set-up as the previous one
but different parameter regime, baroclinic instability
of the flow is evidenced. (movie)
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| Thermal
wind balance and baroclinic instability: a geostrophic
flow is induced by an horizontal temperature gradient
produced by the input of boiling water in a
cylindrical metallic mug located at the center of the
tank. (movie)
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| Taylor
column: the formation of a Taylor column above a
cylindrical obstacle (2cm height) is induced by a
small variation of the rotation speed of the tank and
the evolution of the “outer flow” of
small Rossby number in the vicinity of the
obstacle studied. Next a large Rossby number flow is
induced for comparison with the previous case. (movie)
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Ekman transport in the bottom
boundary layer: a cyclonic/ anticyclonic motion is
induced by a variation of the angular velocity of the
rotating table. The flow is visualized with potassium
permanganate. (movie-cyclone,movie_anticyclone)
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Solitary wave (movie):
a solitary wave is generated by a density step within a
two-layer fluid. The time-space evolution of the wave is
analyzed and compared with that inferred from the
resolution of KdV equation.
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Double Diffusion (movie)
We study the intrusions that developp when an ice block
coloured with potassium permanganate melts into a stably
stratified salt layer of warm water. The scaling of the
intrusions is inferred, that depends the density
gradient.
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