Journal
LANGMUIR
Volume 24, Issue 17, Pages 9207-9210Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la801294x
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In this letter we show that the Marangoni flow contribution to the evaporation rate of small heated water droplets resting on hot Substrates is negligible. We compare data of evaporating droplet experiments with numerical results and assess the effect of Marangoni flow and its contribution to the evaporation process. We demonstrate that heat conduction inside these water droplets is sufficient to give an accurate estimate of evaporation rates. Although convection in evaporating water droplets remains an open problem, our aim in this study is to demonstrate that these effects can be neglected in the investigation of evaporation rate evaluation. It is worth noting that the presented results apply to volatile heated drops which might differ from spontaneously evaporating cases.
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