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DYNAMICS OF WATER CAVITY GENERATION BY PROJECTILES AND EXPLOSIONS

DYNAMICS OF WATER CAVITY GENERATION BY PROJECTILES AND EXPLOSIONS . LA-UR-02-832 Charles L. Mader Michael Gittings. Water Wave Amplitude as Function of HE Charge Depth. Upper Critical. Upper Critical. Lower Critical.

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DYNAMICS OF WATER CAVITY GENERATION BY PROJECTILES AND EXPLOSIONS

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  1. DYNAMICS OF WATER CAVITY GENERATIONBY PROJECTILESAND EXPLOSIONS LA-UR-02-832 Charles L. Mader Michael Gittings

  2. Water Wave Amplitude as Function of HE Charge Depth Upper Critical Upper Critical Lower Critical

  3. PHERMEX Radiographs of a One Inch Dia PBX-9404 Sphere Center InitiatedDetonated Half Submerged in Water STATIC AIR AIR HE 25 microsec WATER 15 microsec 60 microsec

  4. Movie available on NMWW DVD

  5. 1.0 atms Air Pressure

  6. 130 mm Air Pressure

  7. 16 mm Air Pressure

  8. 1 atms Air Pressure

  9. 16 mm Air Pressure

  10. Kendriskii Exploding Bridge Wire Experiments in One Atmosphere Air.

  11. Exploding Bridgewire at 1.0 atms

  12. Kendriskii Exploding Bridge Wire Experiments in ~0.2 Atmosphere Air.

  13. Exploding Bridgewire at 0.2 atms

  14. Exploding Bridgewire at 0.2 atms

  15. CRESTONE NOBEL CODE AMR EULERIAN REACTIVE HYDRODYNAMICS

  16. 0 sec 25 millisec 75 millisec 275 millisec 0.25 cm dia PBX-9404 sphere Detonated Half Submerged in Water in One Atmosphere Air. | 100 cm |

  17. 0 sec 5 millisec 20 millisec 50 millisec 0.25 cm dia Al sphere colliding with water at 2 km/sec in 0.1 Atmosphere | 100 cm |

  18. 0 sec 5 millisec 15 millisec 30 millisec 70 millisec 0.25 cm dia Al sphere colliding with water at 2 km/sec in 5 Atmosphere Air | 100 cm |

  19. 0 sec 25 millisec 75 millisec 125 millisec 0.25 cm dia Al sphere colliding with water at 2 km/sec In 1 Atmosphere Air | 100 cm |

  20. The difference in pressure outside the ejecta plume above the water cavity and the decreasing pressure inside the water plume as it expands results in the ejecta plume converging and colliding at the axisforming a jet above and back intothe bubble cavity which penetrates bottom of the cavity and formsthe stem observed experimentally.

  21. As the atmospheric pressureis reduced the pressure inside the expanding cavity is never less than the pressure outsidethe ejecta plume.No jet or stem is generatedwhile the cavity is expanding.

  22. SummaryThe Nobel Code can describethe experimental observedfeatures of Projectile andExplosion interaction with theOcean and the resultinggeneration of Tsunami Waves

  23. DYNAMICS OF WATER CAVITY GENERATION Charles L. Mader, Michael L. Gittings Science of Tsunami Hazards Vol 21, pages 91-118(2003)

  24. TWO- AND THREE-DIMENSIONAL SIMULATIONS OF ASTEROID OCEAN IMPACT Galen Gisler, Robert Weaver, Charles Mader, Michael Gittings Science of Tsunami Hazards Vol 21, pages 119-134(2003)

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