A high school student team from Tualatin, Oregon designed a microgravity experiment for the NASA DIME competition. This video clip shows the science experiment deploying droplets that hang in mid-air during the free fall drop in the NASA Glenn 2.2 Second Drop Tower.
The fluid is in containers at the base of the vertical glass tubes. The tubes are various diameters and have different shapes as each narrows at the top.
The student team's objective was to deploy droplets in mid-air after the fluid flowed by capillary force into the tubes and then sped up with the narrowed portion of the tube. All of that occurring when the experiment is released to fall in the drop tower.
http://spaceflightsystems.grc.nasa.gov/DIME.html
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