UKFN Videos 31/3/18 shortlist: Recent Episodes
Cambridge University
Fingering patterns form when air is injected into dyed glycerol in a Hele-Shaw cell with a soft upper boundary. As a result, the soft layer deforms. The change in the colour intensity of the dyed fluid reveals both global and local deformations of the soft layer.
A composite video of visible and invisible Infrared showing that when a droplet at 19.7°C impacts on a hot film at 45.8°C, the droplet liquid only partially mixes. The infrared provides us with important information about the mixing processes needed to understand this phenomenon.
This raw video shows wake pattern behind an oscillating cylinder. The forcing amplitude keeps constant; the frequency linearly ramps down. It is part of a systematic study where ramping up and down at various rates. Compared to the fixed frequency cases, ramping results in wake mode transition, skipping and hysteresis.
The video submission shows the fingering phenomenon that arises when two parallel plates are normally separated. The video also shows the experimental rig that was created to study the fingering and the effective viscosity of the fluids.