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Falling stream of water > individual droplets

  1. Mar 29, 2008 #1

    I'm looking at finding a way to determine when a stream of water of a certian diameter coming from a hole at a certian pressure will break apart due to gravity and surface tension into descrete droplets.

    Bernoulli's principle can give me the diameter of the stream at various times but I don't know what exactly governs the breaking apart of the stream into droplets.

    Any help?
  2. jcsd
  3. Mar 30, 2008 #2


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    Look into "Rayleigh instability."
  4. Mar 31, 2008 #3

    Andy Resnick

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    This problem (jet dynamics) is very old, and a definitive presentation is in Chandrasekhar's book "hydrodynamic and hydromagnetic stability" (Dover). Surface tension drives the jet breakup.
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