Clemson University
Department of Mechanical Engineering
Clemson, SC 29634-0921
Phone: (864) 656-5621
Fax: (864) 656-4435
E-Mail:
jrsaylor@ces.clemson.edu
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Clemson University |
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The purpose of this research is to determine how surfactant monolayers affect the topology of the air/water interface during a droplet impact event. Because the length scales which dominate the droplet splash process are on the order of millimeters, the presence of surfactant monolayers should have a significant effect on the various topological features which characterize the splash.
Some of the topological features which comprise the drop splash can be seen in the sequence of images presented below. These images were obtained using a high speed video system, framing at 4500 frames/sec. The first image was obtained just before the drop struck the water surface. The second two images were obtained 6,889 and 40,889 microseconds after the first, respectively.
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The second image illustrates the presence of what is commonly referred to as the `crown,' which subsequently collapses. In the third image, the crown has collapsed, and a `jet' or `stalk' has formed, rising above the water surface. Depending on the drop impact velocity and diameter, the jet may or may not form satellite droplets which separate from the jet and eventually strike the water surface, reinitiating the entire sequence of events. In this particular set of images, the water surface is highly contaminated with the surfactant Triton X-100.
Animations of the droplet impact process are presented below.
Low Resolution - 6.3 Mb (QuickTime)
High
Resolution - 37.3 Mb (QuickTime)
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E-Mail:
jrsaylor@ces.clemson.edu
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Last Updated September 22, 2006.
