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

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SUMMARY

The discussion focuses on calculating the rate of heat loss via conduction between two adjacent materials, specifically steel and air, without a barrier. The user seeks an equation that incorporates temperature difference, area, and thermal conductivity, while also considering mass, volume, and density. The Stefan-Boltzmann constant is acknowledged for calculating black body radiation, but the user emphasizes the need for a specific formula for thermal conduction, which is influenced by the cleanliness and smoothness of the surfaces in contact.

PREREQUISITES
  • Understanding of thermal conductivity principles
  • Familiarity with the Stefan-Boltzmann constant
  • Knowledge of heat transfer equations
  • Basic concepts of material properties such as density and pressure effects
NEXT STEPS
  • Research the equation for thermal conduction, specifically Fourier's Law
  • Explore the concept of thermal contact conductance
  • Learn about the impact of surface roughness on thermal conduction
  • Investigate the role of pressure in thermal conductivity between materials
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Engineers, physicists, and materials scientists interested in heat transfer, thermal management, and the properties of materials in thermal contact.

andythecc
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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
http://en.wikipedia.org/wiki/Thermal_conductivity
"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.
 
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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
 
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