Particle image velocimetry (PIV) is a process of suspending tiny tracer particles in the air and illuminating them with a laser sheet plane. The process is used to visualize and measure the movement of fluids. In this case the fluid is air, which is being displaced and agitated by water. Notice the airflow in the wake of falling droplets and along the borders of the subsequent splashes.
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We hope you had a great 4th of July weekend! What better way to celebrate than with fireworks and a high-speed camera.
Watch closely in the beginning of the video. You can see smoke from the firecracker rising to create gray bubbles on the water’s surface. Later, during the explosion, notice the little streamers of water which shoot up from where the bubbles were. 3ric Johanson explains that when the explosion’s shock wave hits the smoke bubbles, it causes those bubbles to burst and send up the streamers.
filmed at Hackerbot Labs
Hey, don’t look so deflated! The warm weather is fast approaching, when the time will be ripe for instigating water fights. Once again we have pulled out the Phantom high-speed camera, this time to examine how liquids behave in a busting water balloon.
High-speed video…love it;
fire…yes please;
breathing…hope I never have to stop!
Put them together and what have you got? Quite a mesmerizing stunt. Jeff has been slowed down to roughly 1/50 the original speed using the Vision Research Phantom V12.1 high-speed camera.
These high speed photographic images of mosquitoes were captured by Intellectual Ventures Laboratory scientists using a Vision Research Phantom V12.1, shooting at up to 6,000 frames per second. [read more about IV's malaria research]
Understanding Mosquito Flight: Intellectual Ventures researchers study flight dynamics of mosquitoes to look for novel ways to attack them. This video shows a technique called “Particle Image Velocimetry.” Tiny suspended water droplets, illuminated by a green planar laser, show the movement of the air around the mosquito’s wing.
Download video in high definition (58.9 MB)
Mosquito in Flight: This video depicts an Anopheles stephensi mosquito in flight. To capture this footage in focus, the mosquito was placed in a custom designed chamber that sensed when the mosquito flew through the focal plane.
Download video in high definition (19.3 MB)
Mosquito Shootdown Sequence: Video clips showing mosquitoes being killed by lasers. If played in real time, these segments would be roughly 1/10th of a second long.
Download video in high definition (26.2 MB)
We decided to play around with our phantom V12 highspeed camera while testing subfreezing ballistic carving methodologies.
This poor pumpkin was dropped from a 20′ person lift, after being soaked in liquid NO2 for half an hour.. one very chilly pumpkin. As the video shows, not just the skin of the pumpkin was frozen. The entire core of the pumpkin was frozen solid: around 77 degrees Kelvin (-321 degrees F).
We decided to play around with our Phantom V12 highspeed camera while testing subfreezing ballistic carving methodologies.