The
simulation below shows air bubble generation in
a simple co-flowing micro channel. Water and air
enter the micro channel from the same side
(left), separated by a barrier. There are two
steps in the bubble formation process. First the
gas phase expands downwards and horizontally
until a neck is formed, then the neck propagates
downstream and its diameter decreases until it
finally breaks.
In the simulation results on the right, blue
denotes the gas (air) phase and red denotes
the liquid (water) phase.*
*Experimental results taken from Renqiang Xiong,
Mo Bai, Yun Whan Na, Jacob N Chung “Bubble generation in the micro-channel
with a barrier” Proceedings of FEDSM2007 5th
Joint ASME/JSME Fluids Engineering Conference
July 30-August 2, 2007 San Diego, California
USA.
