Can heat flow backward? Unusual thermal phenomena observed in near-critical fluids

D Beysens, Y Garrabos, R Wunenburger and C Lecoutre

Physica A: Statistical Mechanics and its Applications, 2002, vol. 314, issue 1, 427-436

Abstract: A study is presented concerning an experiment under weightlessness. A pure fluid (SF6) is heated near and below its critical point, where liquid coexists with vapor. After the temperature rise, the vapor phase passes well beyond the temperature of the heating walls. This surprising finding is discussed in the light of an adiabatic heat transfer or “Piston effect” and the special geometry of the liquid and vapor. In addition, the shape of the gas–liquid interface is distorted near the solid wall by the thrust of vapor production (“recoil” force), a precursor to the well-known boiling crisis in heat exchanger.

Keywords: Two-phase heat and mass transfer; Near-critical fluids; Low gravity; Adiabatic compression; Boiling crisis (search for similar items in EconPapers)
Date: 2002
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:314:y:2002:i:1:p:427-436

DOI: 10.1016/S0378-4371(02)01175-5

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