Liquid jets Under the Microscope

In this video Dr Sungjune Jung shows us the fluid structures produced by the impact of two liquid jets.

Dr Jung:
“This video shows the evolution of the flow structures generated from the collision of two liquid jets each with a radius of 420um. The jets were ejected from parallel cylindrical nozzles with an internal diameter of 0.85mm.

The collision of the jets resulted in various systems of behaviour which depend on the jet velocities and the liquid properties. We focus on the system where the impinging jets form a liquid sheet which then breaks up into a regular succession of ligaments and droplets, a so-called "fishbone" pattern. This high-speed imaging reveals a fish-like formation for the fluid:
the oval sheet with rims correspond to the fish head, the drops on thin ligaments to its body, and bigger free drops at the end to its tail. We are particularly interested in this fluid formation, because the fishbone phenomenon provides a simple and visual tool to evaluate the properties of inkjet printing fluids, with which the fishbone structure sensitively varies."

Many thanks to Prof Ian Hutchings, Dr Graham Martin and Dr Steve Hoath at Inkjet Research Centre, Department of Engineering.

More info:

Dr Jung's profile:
http://www.oe.phy.cam.ac.uk/people/oepdras/sjj37.htm

Inkjet Research Centre
http://www.ifm.eng.cam.ac.uk/pp/inkjet/

Department of Engineering
http://www.eng.cam.ac.uk/

Music by Intercontinental Music Lab
http://www.intercontinentalmusiclab.com