Joanna Carver, reporter
If your soup splatters all over your stovetop, even though it's not boiling over, jets of liquid are probably to blame. Thomas S?on and colleagues from the French National?Centre?for Scientific Research (CNRS) in Paris have captured the first detailed videos of the jets in action to investigate how they are produced.
To create this slow-mo movie, they filled a fish tank with a viscous sugary syrup and then injected the surface with air to create bubbles measuring a few?centimetres?in diameter - large by bubble standards. Right after a bubble of this size takes shape, a jet can form inside it. If the air is flowing fast enough, it can act like a needle popping the bubble from within, causing violent jets of liquid to shoot out far above the surface.
The team's experiments have revealed that the jets are propelled by a gravity-powered mechanism rather than by the bubble's detachment, as previously thought. Unexpectedly, they found that the speed of a jet is related to a bubble's height: jets move faster in longer bubbles. Trials with different liquids have also shown that viscosity affects how far a jet can travel.
According to S?on, the team's goal is simply to better understand bubbles. "If you can understand them, then you can play with them and maybe get rid of them," he says.
The team will be presenting their latest findings this week at the?American Physical Society's Division of Fluid Dynamics conference?in San Diego, California.
To delve further into the fascinating life and death of bubbles, check out?the world's thinnest screen made from a soap bubble?or?hovering UFO-like droplets.
Voting Locations atlanta falcons voting hours election results Doug Martin Barack Obama & Joe Biden Am I registered to vote
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.