Numerical study of natural convection boiling in a partially heated Rayleigh-Bénard cell
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Date
Authors
Chandratilleke, T.T.
Nadim, N.
Journal Title
Journal ISSN
Volume Title
Publisher
International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics
Abstract
Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.
This paper presents a numerical investigation on Rayleigh-Bénard (RB) cell with natural convective liquid boiling, which is vastly different to thermo-fluids nature of its classic single phase counter-part. The study develops a simulation model and examines the unique fluid and thermal characteristics associated with this two-phase RB cell for a range of heater power. The boiling heat transfer curve is obtained covering single phase to boiling process within the RB cell while identifying its unique fluid features. Unlike cellular convective structures in single-phase RB cell, the analysis on this boiling RB cell indicates a fast rising fluid plume emulating “siphoning” fluid action that develops according to heating levels and vapour composition. It also shows that the vapour bubble dynamics critically influence and determine vapour migration within the boiling fluid and heater surface thermal patterns, making this cell behaviour uniquely different to that of traditional RB cell and conventional pool boiling.
This paper presents a numerical investigation on Rayleigh-Bénard (RB) cell with natural convective liquid boiling, which is vastly different to thermo-fluids nature of its classic single phase counter-part. The study develops a simulation model and examines the unique fluid and thermal characteristics associated with this two-phase RB cell for a range of heater power. The boiling heat transfer curve is obtained covering single phase to boiling process within the RB cell while identifying its unique fluid features. Unlike cellular convective structures in single-phase RB cell, the analysis on this boiling RB cell indicates a fast rising fluid plume emulating “siphoning” fluid action that develops according to heating levels and vapour composition. It also shows that the vapour bubble dynamics critically influence and determine vapour migration within the boiling fluid and heater surface thermal patterns, making this cell behaviour uniquely different to that of traditional RB cell and conventional pool boiling.
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Keywords
Rayleigh-Bénard cell, natural convective liquid boiling
Sustainable Development Goals
Citation
Chandratilleke TT, Nadim N 2014, 'Numerical study of natural convection boiling in a partially heated Rayleigh-Bénard cell', Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.