An experimental study of rupture dynamics of evaporating liquid films on different heater surfaces

Experimental data were obtained to reveal the complex dynamics of thin liquid films evaporating on heated horizontal surfaces, including formation and expansion of dry spots that occur after the liquid films decreased below critical thicknesses. The critical thickness of water film evaporating on va...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2011-03, Vol.54 (7-8), p.1538-1547
Main Authors: Gong, Shengjie, Ma, Weimin, Dinh, Truc-Nam
Format: Article
Language:English
Subjects:
Applied sciences
Contact angle
Dynamics
Energy
Energy. Thermal use of fuels
Evaporation
Exact sciences and technology
Film dynamics
Film evaporation
Film rupture
Film thickness measurement
Heat transfer
Heaters
Heating equipment
Liquid film
Liquid films
Rupture
TECHNOLOGY
TEKNIKVETENSKAP
Theoretical studies. Data and constants. Metering
Thermal conductivity
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Summary:Experimental data were obtained to reveal the complex dynamics of thin liquid films evaporating on heated horizontal surfaces, including formation and expansion of dry spots that occur after the liquid films decreased below critical thicknesses. The critical thickness of water film evaporating on various material surfaces is measured in the range of 60–150μm, increasing with contact angle and heat flux while decreasing with thermal conductivity of the heater material. In the case of hexane evaporating on a titanium surface, the liquid film is found resilient to rupture, but starts oscillating as the averaged film thickness decreases below 15μm.
ISSN:0017-9310
1879-2189
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2010.11.036