Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7059883 | International Journal of Heat and Mass Transfer | 2011 | 7 Pages |
Abstract
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 â¼0.2 K in the 150 μm 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 μm sub-region measured from the contact line is estimated by an approximate heat balance analysis to be â¼45% for the range of liquid feeding rates explored.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Christopher P. Migliaccio, Hemanth K. Dhavaleswarapu, Suresh V. Garimella,