Recent content by katelr

  1. katelr

    When/How does thermal radiation stop (if it stops) and conduction

    I'm not sure where the lack of clarity is, so I'm going to talk about a practical implication: insulation of home attics. In modern practice it is customary to place, facing the ceiling, a foil of aluminium inside the attic to reflect the thermal radiation coming from the ceiling. Products...
  2. katelr

    When/How does thermal radiation stop (if it stops) and conduction

    I almost got the full answer from anorlunda above, when he/she said "Certainly, an atom can emit a photon which is absorbed by a neighboring atom." (as a mechanical engineer, I'm ignorant about physics at this level, so this phrase alone was good guidance.) Let met share the answer I got from...
  3. katelr

    When/How does thermal radiation stop (if it stops) and conduction

    To add to that, from the same Wikipedia article: "In solids, conduction is mediated by the combination of vibrations and collisions of molecules, of propagation and collisions of phonons ([sic], not photons), and of diffusion and collisions of free electrons." So, whoever wrote that did not...
  4. katelr

    When/How does thermal radiation stop (if it stops) and conduction

    Consider two solid objects in the vacuum (of different materials, if you will) at different temperatures approaching each other until they make "perfect contact" through flat surfaces (no gaps or defects, so that thermal contact conductance effects are absent, even though interfacial thermal...
    • katelr
    • Thread
    • Conduction Heat Radiation Thermal Thermal conductivity Thermal radiation
    • Replies: 13
    • Forum: Thermodynamics
  5. katelr

    Can You Master Heat Transfer? Check Out This MIT Resource!

    Hi. I'm hear to learn about heat transfer!
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