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Article | REF: BE9812 V1

Heat transfers at low temperature

Authors: Bertrand BAUDOUY, Gérard DEFRESNE, Patxi DUTHIL, Jean-Pierre THERMEAU

Publication date: January 10, 2015, Review date: October 28, 2019

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5. Comparison of different heat transfer modes

The thermal powers exchanged by an assumed very large surface at temperature T are shown in figure 14 . These comparative powers are generated at a temperature difference of 1 K :

  • by radiation between two walls ;

  • by conduction in helium between two walls separated by 1 cm ;

  • by natural or forced convection in helium around a horizontal rod 1 cm in diameter; in the case of forced convection, helium is assumed to move around the rod at a speed of 1 m/s.

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Comparison of different heat transfer modes
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