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Velocity gradient

  1. Jan 19, 2016 #1
    1. The problem statement, all variables and given/known data
    why the velocity gradient is given by the formula u(y) = y(V) / l , why not V / l ?

    2. Relevant equations


    3. The attempt at a solution
     

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  3. Jan 19, 2016 #2

    BvU

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    Where does it say so ?
     
  4. Jan 19, 2016 #3
    The equation you wrote is for the velocity, not the velocity gradient. What do you get if you differentiate your equation for u with respect to y?
     
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