Papers presented to the 11th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 20-23 July 2015.
Stability of vapor film over a horizontal heater drags attention
due to its wide spread applications in nuclear reactors, metal
processing, manufacturing and chemical refineries. Existence
of vapor film around the heater can cause advantages as well as
disadvantages for various applications in industry and daily life.
Hence understanding the film formation and its subsequent
release in the form of bubble are dealt carefully by researchers
in heat transfer community. Critical vapor thickness and
average heat flux are the essential parameters which govern the
release of vapor mass in the form of isolated bubbles from the
surface. Experimental evidences have been reported in order to
find out film dynamics for some specific fluids. However
understanding it from the fundamental physics is still due and
becomes a major challenge for heat transfer community. In this
paper, numerical analysis of the film boiling heat transfer on a
horizontal cylinder is presented to determine the effect of
superheating on the heat transfer coefficient and film thickness
in a pool. Findings from the present study will develop
knowhow about the film formation and its role in enhancing the
boiling heat transfer coefficient.