Time-dependent buoyant puff model for explosive sources

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Several models exist to predict the time dependent behavior of bouyant puffs that result from explosions. This paper presents a new model that is derived from the strong conservative form of the conservation partial differential equations that are integrated over space to yield a coupled system of time dependent nonlinear ordinary differential equations. This model permits the cloud to evolve from an intial spherical shape not an ellipsoidal shape. It ignores the Boussinesq approximation, and treats the turbulence that is generated by the puff itself and the ambient atmospheric tubulence as separate mechanisms in determining the puff history. The puff ... continued below

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62 p.; Other: FDE: PDF; PL:

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Kansa, E. J. January 1997.

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Description

Several models exist to predict the time dependent behavior of bouyant puffs that result from explosions. This paper presents a new model that is derived from the strong conservative form of the conservation partial differential equations that are integrated over space to yield a coupled system of time dependent nonlinear ordinary differential equations. This model permits the cloud to evolve from an intial spherical shape not an ellipsoidal shape. It ignores the Boussinesq approximation, and treats the turbulence that is generated by the puff itself and the ambient atmospheric tubulence as separate mechanisms in determining the puff history. The puff cloud rise history was found to depend no only on the mass and initial temperature of the explosion, but also upon the stability conditions of the ambient atmosphere. This model was calibrated by comparison with the Roller Coaster experiments.

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62 p.; Other: FDE: PDF; PL:

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OSTI as DE98057434

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  • Other Information: PBD: 1 Jan 1997

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  • Other: DE98057434
  • Report No.: UCRL-ID--128733
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/289269 | External Link
  • Office of Scientific & Technical Information Report Number: 289269
  • Archival Resource Key: ark:/67531/metadc665780

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  • January 1997

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Feb. 16, 2016, 6:17 p.m.

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Kansa, E. J. Time-dependent buoyant puff model for explosive sources, report, January 1997; California. (digital.library.unt.edu/ark:/67531/metadc665780/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.