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The rate of cooling of a material in air, or with no barrier between materials

  1. Jun 5, 2009 #1
    I'm unsure how to approach this, as solid blocks of materials next to each other (e.g. steel and air) with no barrier inbetween as shown on
    "x" would equal zero, this can't be correct. Is there another equation relating temperature difference, area and conductivity of two adjacent materials? Possibly also mass, volume or density? All I really want is a rate of heat loss via conduction in Watts or Watts/m². I know how to calculate Black Body ratiation via the Stefan-Boltzmann constant.
  2. jcsd
  3. Jun 5, 2009 #2


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    The thermal conduction of a junction is a little different
    Assuming both surfaces are clean and smooth it largely depends on pressure.

    see http://en.wikipedia.org/wiki/Thermal...ct_conductance [Broken]
    Last edited by a moderator: May 4, 2017
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