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Article citations


Ishii, R., Hatta, N., Umeda, Y. and Yuhi, M. (1990) Supersonic Gas-Particle Two-Phase Flow around a Sphere, Journal of Fluid Mechanics, 221, 453-483.

has been cited by the following article:

  • TITLE: Visualization of High-Speed Impact of Projectile in Granular Sheet with Destructive Collision of Particles

    AUTHORS: Chihiro Masaki, Kojiro Suzuki, Yasumasa Watanabe

    KEYWORDS: Ballistic Range, Impact, Granular Flow, Collision, High-Speed Camera

    JOURNAL NAME: Journal of Flow Control, Measurement & Visualization, Vol.6 No.3, June 29, 2018

    ABSTRACT: The impact and penetration of a projectile in a particle-laden space, which are expected to have frequently occurred during the formation of the solar system and will occur in the case of an impact probe for future planetary exploration, were experimentally simulated by using the ballistic range. A two-dimensional sheet made from small glass beads or emery powder was formed by the free-falling device through a long slit in the test chamber evacuated down to about 35 Pa. A polycarbonate projectile of a hemi-sphere-cylinder or sphere shape with the mass and diameter about 4 g and 25 mm, respectively, was launched at the velocity up to 430 m/s, and the phenomena were observed by the high-speed camera at 20,000 fps. From a series of images, the bow-shock-wave-like laterally facing U-shaped pattern over the projectile and the absence of particles in the trail behind it were clearly seen. At the impact of the particles on the projectile surface, fine grains were formed due to the destructive collision and injected outward from the projectile. The images obtained by different lighting methods including the laser light sheet were compared. The effects of the particle diameter, its material and the impact velocity were also investigated.