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ICLASS 2009, 11th Triennial International Annual Conference on Liquid Atomization and Spray Systems, Vail, Colorado USA, July 2009
 

Summary: ICLASS 2009, 11th
Triennial International Annual Conference on Liquid Atomization and Spray Systems, Vail, Colorado USA, July 2009
Single Droplet Heat Transfer through Shallow Liquid Pools
Henry Vu1
, Guillermo Aguilar1*
and Richard Jepsen2
1
University of California, Riverside, CA 92521
2
Sandia National Laboratories, Albuquerque, NM 87185
Abstract
Many studies exist examining the underlying physics behind single droplet impact splashing and cooling. How-
ever, despite its practical importance, little information exists concerning the influence of liquid surface films on
resultant heat transfer. In this study, water droplet impact behavior into quiescent liquid pools was visualized using a
high-speed video camera set at 3000 fps. The impacting droplets were dyed in order to promote contrast and visuali-
zation. Pool depths ranging from 0 to twice the droplet diameter were used in order to assess its influence on impact
dynamics. Additionally, heat transfer was measured from an epoxy block substrate. The epoxy block surface was
heated to 42C to induce heat transfer with the impinging droplet which was kept at room temperature. Transient
surface temperature history was recorded with a flat, fast-response thermocouple embedded at the substrate surface.
Heat flux and overall heat extraction was subsequently calculated using Duhamel's Theorem. Droplet diameter and

  

Source: Aguilar, Guillermo - Department of Mechanical Engineering, University of California at Riverside

 

Collections: Engineering