Fluid Dynamics: Bernoulli's Principle
Where flow is faster, pressure is lower
0:50 · 720p · With AI narration and captions. This sample was made with the same system as this service.
Narration (full text)
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Bernoulli's Principle
In flowing water or air, pressure is lower where the flow is faster. This is Bernoulli's principle.
Faster Where It's Narrow
When a pipe narrows, the water flows faster there. That's because the same amount of water must pass through in the same time.
Seeing the Pressure
Water height in the thin tubes shows the pressure. In the narrow, fast-flowing part, the water level is lower, so the pressure is lower.
Total Energy Stays Constant
The flow's total energy is the same everywhere. When the speed part grows, the pressure part shrinks by just as much.
Everyday Example: Atomizer
Fast air across the tube's tip lowers the pressure. Water then rises up the tube and sprays out as a fine mist.
Faster Flow, Lower Pressure
Where the flow is faster, the pressure is lower. That's Bernoulli's principle.
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