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Newtonian viscosity equaton

  1. Jun 17, 2007 #1
    Could anyone explain me and comment the Newtonian viscosity equaton?
     
  2. jcsd
  3. Jun 17, 2007 #2

    arildno

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    I assume you mean, why is the force of friction in a fluid proportional to the velocity gradient in it? (the proportionality factor being the viscosity)

    The simplest answer is that meticulous experiments showed that that was, indeed, a very good approximation.

    There's a lot more to say about this, of course, but I'll let this be enough for today
     
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