Temperature measurements near the contact line of an evaporating meniscus V-groove
نویسندگان
چکیده
Evaporation from a meniscus of heptane liquid in a V-groove geometry is experimentally investigated. A thin layer of titanium coated on the backside of the fused quartz groove is electrically heated to provide a constant heat flux. The temperature profile in the evaporating thin film region of the extended meniscus is measured using high-resolution infrared thermography and the temperature suppression in this region is obtained as a function of liquid feeding rate. The meniscus shape is captured using a goniometer. A temperature suppression of 0.2 K in the 150 lm region surrounding the contact line on each side indicates the efficacy of evaporation in the extended meniscus. At a given axial location, the fraction of total meniscus heat transfer which takes place in a 50 lm sub-region measured from the contact line is estimated by an approximate heat balance analysis to be 45% for the range of liquid feeding rates explored. 2010 Elsevier Ltd. All rights reserved.
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Microscale Temperature Measurements near the Contact Line of an Evaporating Thin Film in a V-Groove
Thin-film evaporation of heptane in a V-groove geometry is experimentally investigated. The groove is made of fused quartz, and electrical heating of a thin layer of titanium coated on the backside of the quartz substrate provides a constant heat flux. The effects of liquid feeding rate on the temperature suppression in the thin-film region and on the meniscus shape are explored. High resolutio...
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