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Heat Transfer

  1. Apr 15, 2009 #1
    HI

    when dealing with natural convection, we use grashof's number. suppose we have a heated plate of temperature Tp. and heat being transferred to surrounding air by convection, air of temp Ta.

    So film temp is Tf = 0.5(Tp + Ta)

    If grashofs numbers, [tex]Gr = \frac { \beta gL^3 \delta T}{\nu^2}[/tex]

    im wondering what [tex]\delta T[/tex] and what [tex]\beta[/tex] we use.

    thanks
     
  2. jcsd
  3. Apr 15, 2009 #2

    Mapes

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  4. Apr 16, 2009 #3
    Last edited by a moderator: Apr 24, 2017
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