Non-condensable gas influence on the Marangoni convection during a single vapour bubble growth in a subcooled liquid - Archive ouverte HAL Access content directly
Journal Articles EPL - Europhysics Letters Year : 2007

Non-condensable gas influence on the Marangoni convection during a single vapour bubble growth in a subcooled liquid

Abstract

Liquid convective instabilities during a single vapour bubble growth in subcooled FC-72 are experimentally investigated. The bubble was created on an artificial nucleation site located on a downward facing heating element. For a non-degassed liquid, convective instabilities were observed using a shadowgraphy method and tracer particles. Both stationary and oscillatory modes were observed, and this instability was found to be Marangoni convection. Comparing results with a degassed and a non-degassed liquid, it was found that the onset of Marangoni convection was due to the presence of non-condensable gases in the liquid. Finally, the combination of Marangoni convection and condensation enables us to highlight a thermal oscillator, with a change in the type of oscillatory motion during the condensation phase.
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Dates and versions

hal-00326524 , version 1 (03-10-2008)

Identifiers

  • HAL Id : hal-00326524 , version 1

Cite

Magali Barthes, Christelle Reynard, Robert Santini, Lounes Tadrist. Non-condensable gas influence on the Marangoni convection during a single vapour bubble growth in a subcooled liquid. EPL - Europhysics Letters, 2007, 77 (1), pp.14001. ⟨hal-00326524⟩
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