Thermalization of a two-phase fluid in low gravity : heat transferred from cold to hot

Régis Wunenburger (1, 2) , Yves Garrabos (1, 2) , Carole Lecoutre-Chabot (1, 2) , Daniel Beysens (3, 2) , John Hegseth (4)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 ESEME : Équipe du Supercritique pour l'Environnement, les Matériaux et l'Espace : Équipe commune CEA-CNRS (2000-2014)
3 SBT - Service des Basses Températures
4 Department of Physics [New Orleans]

We present an experimental study of the thermal response to a positive temperature quench in twophase fluid SF 6 in low gravity for temperature ranging from 10.1 to 0.1 K from the critical temperature. The temperature was measured simultaneously in the gas, the liquid, and the cell wall by thermistors and the density distribution was observed by interferometry. During the quench the gas temperature considerably exceeded the temperature of the heating walls (overheating up to 23%). This striking observation is discussed in the light of the adiabatic heat transfer in this highly compressible fluid while the key role of the localization in low gravity of the gas and liquid phases is revealed.

Domaines: Matériaux

Régis Wunenburger, Yves Garrabos, Carole Lecoutre-Chabot, Daniel Beysens, John Hegseth. Thermalization of a two-phase fluid in low gravity : heat transferred from cold to hot. Physical Review Letters, 2000, 84 (18), pp.4100-4103. ⟨10.1103/PhysRevLett.84.4100⟩. ⟨hal-03266082⟩