Under the Microscope #11 - Jet streams

Feb 24, 2012

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

This video is not supported by your browser at this time.

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 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 , 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.”

Under the Microscope is a collection of videos that show glimpses of the natural and man-made world in stunning close-up. They are released every Monday and Thursday and you can see them here: bit.ly/A6bwCE

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

Explore further: Economics = MC2—A portrait of the modern physics startup

add to favorites email to friend print save as pdf

Related Stories

Photos show how a specific fluid defies normal activity

Nov 30, 2010

An illustration showing a scientific phenomenon that defies common intuition has garnered Sunghwan (Sunny) Jung, assistant professor of engineering science and mechanics at Virginia Tech, and his doctoral ...

Under the microscope #9 - skate head

Feb 17, 2012

Under the Microscope is a collection of videos that show glimpses of the natural and man-made world in stunning close-up. They are released every Monday and Thursday and you can see them here: http://bit.ly/A6bwCE

Single cell injections

Aug 09, 2010

Duke University physicists have developed a way to produce sharp fluid jets with enough precision that they can inject material into a single, living cell. The technique promises a way to deliver drugs to ...

Recommended for you

Steering chemical reactions with laser pulses

7 hours ago

With ultra-short laser pulses, chemical reactions can be controlled at the Vienna University of Technology. Electrons have little mass and are therefore influenced by the laser, whereas the atomic nuclei ...

Grasp of SQUIDs dynamics facilitates eavesdropping

Apr 22, 2014

Theoretical physicists are currently exploring the dynamics of a very unusual kind of device called a SQUID. This Superconducting Quantum Interference Device is a highly sensitive magnetometer used to measure ...

UK's lead in physics healthy but insecure

Apr 22, 2014

The quantity and quality of scientific papers produced by UK physicists indicates that the UK remains in an elite group of nations contributing at the leading edge of physics research.

User comments : 0

More news stories

Cyber buddy is better than 'no buddy'

A Michigan State University researcher is looking to give exercise enthusiasts the extra nudge they need during a workout, and her latest research shows that a cyber buddy can help.