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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

NUMERICAL ANALYSIS OF SINGLE BUBBLE DEPARTURE FROM A HEATED SURFACE

Get access (open in a dialog) DOI: 10.1615/IHTC11.3940
pages 355-360

Sinopsis

Numerical analysis has been performed on bubble growth and departure from a heated surface in order to elucidate the mechanism of nucleate boiling heat transfer. Transient Navier-Stokes and energy equations were solved simultaneously both for liquid and vapor phases. Evaporation at the liquid-vapor interface was taken into account. We made use of an improved VOF (Volume of Fluid) method to trace the shape of bubble.
A single bubble of helium on a flat surface and in a cavity under atmospheric pressure has been simulated. The temperature distribution obtained is quite similar to the photograph of thermal boundary layer. Velocity vectors inside and outside of the bubble and the distribution of the Nusselt number on the heat transfer surface are obtained. Change of the bubble radius with time almost agrees with those by previous studies[6]-[12].