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Article Dans Une Revue International Journal of Heat and Mass Transfer Année : 2010

Thermally induced two-phase oscillating flow inside a capillary tube

Résumé

This paper deals with thermally induced meniscus oscillations in a two-phase system consisting of a liquid plug and a vapor bubble in a capillary tube of circular cross section. This system represents the simplest version of a heat transfer device called ''pulsating heat pipe" (PHP). Our purpose is to gain fundamental understanding of the physical processes that cause self-sustained thermally driven oscillations. A visualization experiment is performed and the oscillations of the liquid-vapor meniscus and the vapour pressure are observed. We propose next a theoretical model. It differs from existing models by the account of the two-phase equilibrium that occurs locally at the vapor-liquid interface and by introduction of the time varying wetting films through which the major part of the heat and mass transfer occurs. Results from the proposed model show a good agreement with the experiment.

Dates et versions

hal-01026174 , version 1 (21-07-2014)

Identifiants

Citer

S.P Das, V.S. Nikolaev, Frédéric Lefèvre, B. Pottier, S. Khandekar, et al.. Thermally induced two-phase oscillating flow inside a capillary tube. International Journal of Heat and Mass Transfer, 2010, 53, pp.3905-3913. ⟨10.1016/j.ijheatmasstransfer.2010.05.009⟩. ⟨hal-01026174⟩
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