Shadowgraph visualisations of salt-stratified turbulence obtained in a stratified inclined duct (SID) laboratory experiment

A collection of 113 experimental datasets corresponding to flow visualisations obtained in the G. K. Batchelor Laboratory (Department of Applied Mathematics and Theoretical Physics, University of Cambridge). The experiments were setup to create stratified turbulence generated via an exchange flow through a long tilted duct (L=2000, H=50, W=100 mm) connecting two large reservoirs (400 litres each) containing saltwater (NaCl) at different densities. The movies consist of shadowgraph visualisations, where parallel light was shone through the flow and projected onto a semi-transparent screen, where it was recorded by a video camera. The movies show the evolution of density (salinity) contrasts in the flow, including the formation and break up of density interfaces, as well as scouring and overturning behaviours. Each of the 113 movies corresponds to a distinct experiment, collectively covering a two-dimensional parameter space (Reynolds number and tilt angle) where various turbulent behaviours take place. This allows the study of a range of turbulent mixing processes responsible for transporting mass and momentum in stratified fluid systems like the oceans. Please refer to the READ_ME file for detailed information on the folder contents and organisation.