Dynamics of Water Entry of Hydrophilic & Hydrophobic Spheres
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Uploaded by emulenews on Oct 14, 2008
From "Dynamics of Water Entry" by Tadd T. Truscott, Jerey M. Aristoff, & Alexandra H. Techet, Massachusetts Institute of Technology.
The videos illustrate the hydrodynamics associated with water-entry of spheres, which can be highly variable with respect to their material and kinematic properties. The first video, contrasts the nature of impact between a hydrophilic and hydrophobic sphere and illustrates how surface coating can affect whether or not an air cavity is formed. The second one, illustrates how spin and surface treatments can alter the splash and cavity formation following water entry. The third one compares two millimetric nylon spheres impacting at slightly different impact speeds; the faster sphere fully penetrates the free surface, forming a cavity, whereas the slower sphere does not. The fourth series shows the instability of an elongated water-entry cavity formed by a millimetric steel sphere with a hydrophobic coating impacting at 600cm/s. Finally, a millimetric steel sphere with a hydrophobic coating breaks the free surface with an impact speed of 350cm/s. More information in
http://arxiv.org/abs/0810.1888
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OOO I want to play too!
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that was actually kind of beautiful...
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Is it possible to find a plastic or rubber which can attached itself to the surface of the skin by using moisture?
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hydrophobic one behaves a lot like the ball dropped in sand stuff.
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cool
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wet
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Awesome
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cool
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Interesting Indeed.. in particular the point at which the object makes contact with the H20 and confirms the conservation of energy theory and releases a splash.... now back to redtube...
bozman82 2 years ago 6