Conduction

Heat transfer by conduction

• No observable motion of matter.
• In metallic solids motion of unbound electrons.
  
• In liquids transport of momentum between molecules.
  
• In gases molecular diffusion (the random motion of molecules).
  

Constitutive equations

• Conduction through a plane wall
• Conduction through a circular wall

Material constants

• Thermal conductivity values

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Heat transfer by convection

Heat transfer by radiation