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Bernoulli’s Principle

Learn how Bernoulli’s Principle affects fluid dynamics, from fast-moving fluids exerting low pressure to slow-moving fluids exerting high pressure. Explore how this principle explains lift in airplanes and the movement of air around a wing. Discover why shower curtains “creep” and how tall buildings and windows can be affected by fast, low, slow, or high pressure situations.

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Bernoulli’s Principle

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  1. FAST LOW P SLOW HIGH P Bernoulli’s Principle For a fluid traveling // to a surface: …FAST-moving fluids exert LOW pressure …SLOW- “ “ “ HIGH “ LIQUID OR GAS roof in hurricane FAST LOW P SLOW HIGH P

  2. (BERNOULLI’S PRINCIPLE) FAST LOW P Resulting Forces (GRAVITY) AIR PARTICLES SLOW HIGH P airplane wing / helicopter propeller frisbee

  3. Bernoulli’s Principle Faster moving air on top  less air pressure Low Pressure Air foil High Pressure LIFT Slower moving air on bottom  high air pressure Air moves from HIGH pressure to LOW pressure

  4. Bernoulli’s Principle Fast moving fluid exerts low pressure. Slow moving fluid exerts high pressure. Fluids move from concentrations of high to low concentration. LIFT AIR FOIL (WING) Pressure exerted by slower moving air

  5. "Creeping" Shower Curtain CURTAIN COLD SLOW HIGH Pressure WARM FAST LOW Pressure

  6. TALL BUILDING FAST LOW P SLOW HIGH P WINDOWS BURST OUTWARDS windows and high winds (e.g., tornadoes)

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