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Bernoulli's Equation

  1. Feb 10, 2009 #1
    Hi,

    Hopefully a very simple question for someone that knows; We know from Bernoulli's principle that an area of high velocity creates an area of low pressure and vice versa. My question is how is this created?

    Thanks
     
  2. jcsd
  3. Feb 10, 2009 #2

    russ_watters

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    Staff: Mentor

    It is a manifestation of conservation of energy. And to be more accurate and descriptive, Bernoulli's principle states that the total pressure (ie, the energy) is constant along a streamline. So when you have an area of higher velocity, you get a higher velocity pressure - and by conservation of energy, the static pressure must be lower.
     
  4. Feb 10, 2009 #3

    tiny-tim

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    Science Advisor
    Homework Helper

    Just to enlarge on that:

    pressure = force/area,

    so pressure/density = force times distance/mass = work done/mass = energy gained/mass :wink:
     
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