Temperature Measurements of Falling Droplets

[+] Author and Article Information
M. R. Wells, L. A. Melton

Department of Chemistry, The University of Texas at Dallas, Richardson, TX 75083

J. Heat Transfer 112(4), 1008-1013 (Nov 01, 1990) (6 pages) doi:10.1115/1.2910472 History: Received October 26, 1989; Revised March 21, 1990; Online May 23, 2008


The temperature of 225-μm-dia decane droplets, which have fallen 100 mm through a hot quiescent, oxygen-free environment, has been measured using exciplex fluorescence thermometry. The droplets were doped with pyrene, and the relative intensities of pyrene monomer and excimer emissions were used to determine the droplet temperatures. The droplet temperature increases approximately 0.4°C per °C increase in the ambient temperature up to an ambient temperature of 200°C. Less than 10 percent evaporation was observed for the droplets at the highest ambient temperatures.

Copyright © 1990 by The American Society of Mechanical Engineers
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