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Splashes caused by a spherical body plunging into water were investigated experimentally using a high speed CMOS camera. We categorized types of splash according to impact velocities of the sphere. Three types of splash were found: Type-I is a thin spire-type splash, Type-II is a mushroom-type splash with many droplets, and Type-III is a crown-type splash with many droplets. The reaction to the concave...
A visualization technique using an ultraviolet CCD camera has been successfully applied to the non-contact monitoring of molten pools produced in material processing by high power CO2 lasers. This technique is based on the principle that the temperature sensitivity of UV radiation emitted from molten pools is much higher than visible or infrared region. Additionally, the target area directly irradiated...
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