K-H Instability

Making a current speed difference
at the density boundary layer

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Water tank
Material: 10mm thick acrylic board
Height: 6cm
Depth: 6cm
Width: 195cm

The tank was set on a tripod for heavy camera so that it can be tilted at an arbitrary angle.
This tank is about half size of Thorpe's experiment.3)

Working Fluid
Salt water and pure water
 
Visualization
Ink was mixed with the salt and pure water, making the boundary layer visible.
 
Experimental process
The same amount of salt and pure water are poured into the tank, which is then placed exactly horizontal. The tank is then tipped at an angle when the boundary layer has settled.