Calculated Flow and Energy Distribution Following Underwater Detonation of a Pentolite Sphere

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  • H. M. Sternberg
    Naval Ordnance Laboratory, White Oak, Silver Spring, Maryland 20910
  • W. A. Walker
    Naval Ordnance Laboratory, White Oak, Silver Spring, Maryland 20910

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<jats:p>The artificial viscosity method is used to calculate the flow following the detonation of a centrally initiated pentolite sphere in fresh water at sea level, up to the time the main shock in the water is 100 charge radii from the center. Pressure, particle velocity, and temperature versus distance at various times are obtained; also peak pressures, time constants, and pressure versus time at fixed positions. Partial steam formation in the water close to the gas bubble is shown to be possible but unimportant at the distances covered. The partition and distribution of kinetic and internal energies in the water and the gas sphere, and the energy dissipated by shock heating, are found. The calculated dissipated energy is 33% of the total energy released in the detonation when the shock front is 10 charge radii from the center, and 40.5% when the shock front is 100 charge radii from the center.</jats:p>

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