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Contribution to pool boiling analysis: experimental study of thermocapillary convection around a bubble.

Author(s) : ARLABOSSE P., TADRIST H., JAEGER M., TADRIST L.

Summary

Thermocapillary flow induced by a gas bubble in silicone oil layer submitted to a vertical temperature gradient is investigated. In this configuration, buoyancy and thermocapillary forces act in opposite way. The velocity field is measured in the meridian plane of the bubble. The influence of fluid viscosity, bubble shape and temperature gradient is studied. The magnitude of the heat transfer due to the Marangoni effect is measured beneath the bubble for various temperature gradients and different thickness of the silicone oil layer. A numerical 2D model based on finite element method has been developed. Numerical results are compared with experimental measurements. The influence of gravity on the thermocapillary flow is analysed and the heat transfered by thermocapillarity is estimated, when the gravity is neglected.

Details

  • Original title: Contribution to pool boiling analysis: experimental study of thermocapillary convection around a bubble.
  • Record ID : 1998-0156
  • Languages: English
  • Source: Proceedings of EUROTHERM Seminar n. 48. Pool boiling 2.
  • Publication date: 1996/09/18
  • Document available for consultation in the library of the IIR headquarters only.

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