Analysis of heat transfer and fluid flow in an evaporating sessile droplet for evaporative cooling applications
Date
2015-08-01
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Abstract
Cooling is of critical importance for a number of fields, particularly in microelectronic
devices and other miniaturized technology. The evaporation of the sessile liquid
droplet facilitates the phase change of that liquid and provides cooling to the system,
because a large amount of latent heat is required to change the phase. Evaporation
takes place at the liquid-vapour interface, so to enhance the phase change process, it
is essential to understand the interfacial energy transport mechanisms involved in
transporting energy to the liquid-vapour interface from the solid substrate and the
vapour surrounding. A series of experiments were conducted under different
experimental conditions to understand interfacial energy transport in an evaporating
sessile droplet. The experimental results demonstrate the effect of the ambient and
substrate temperature on the evaporation process and the relative contributions of
the conduction energy transport and other modes of energy transport in the total
energy required for the phase change process.
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Keywords
Evaporation, Sessile droplet, Cooling, Phase change