Streamlines on a wind-swept surface revealed by titanium dioxide mixture —Connor O'Pray (University of Cambridge)

Streamlines on a wind-swept surface are visualised with an oil-flow mixture comprising of titanium dioxide, paraffin, motor oil and oleic acid. The evaporation pattern in the lower-right corner of the image formed naturally one hour after the initial experiment.

https://fluids.ac.uk/files/03_SurfaceStreamlines_OPray_UniversityofCambridge[resample_3840w].1662484804.jpg