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Numerical study of underwater explosions and following bubble pulses

by A. Abe, M. Katayama, K. Murata, Y. Kato, K. Tanaka
AIP Conference Proceedings ()
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Underwater explosions and following bubble pulses were simulated by using a hydrocode ANSYS AUTODYN. Effects of (a) pressure gradient depending on a water depth, (b) atmospheric pressure, (c) gravitational acceleration during bubble pulsation and (d) reaction process of non-ideal detonation on bubble pulsation phenomena were investigated numerically. Numerical bubble properties were compared with experimental data. Emulsion explosive of a charge weight 100g was detonated at water depth of 4m in an underwater explosion testing tank. These conditions (a), (b) and (d) could lead precise simulations of the bubble pulses consistent with the experimental data. The condition (c) could give bubble upward motion under its buoyancy effect

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