Time-dependent buoyant puff model for explosive sources

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This paper presents a new model for explosive puff rise histories that is derived from the strong conservative form of the partial differential equations of mass, momenta, and total energy that are integrated over space to yield a coupled system of time dependent nonlinear ordinary differential equations (ODEs). By allowing the dimensions of the puff to evolve laterally and horizontally, the initial rising spherical shaped puff evolves into a rising ellipsoidal shaped mushroom cloud. This model treats the turbulence that is generated by the puff itself and the ambient atmospheric turbulence as separate mechanisms in determining the puff history. The ... continued below

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

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Kansa, E.J. October 1, 1997.

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Description

This paper presents a new model for explosive puff rise histories that is derived from the strong conservative form of the partial differential equations of mass, momenta, and total energy that are integrated over space to yield a coupled system of time dependent nonlinear ordinary differential equations (ODEs). By allowing the dimensions of the puff to evolve laterally and horizontally, the initial rising spherical shaped puff evolves into a rising ellipsoidal shaped mushroom cloud. This model treats the turbulence that is generated by the puff itself and the ambient atmospheric turbulence as separate mechanisms in determining the puff history. The puff rise history was found to depend not only upon the mass and initial temperature of the explosion, but also upon the local stability conditions of the ambient atmosphere through which the puff rises. This model was calibrated by comparison with the Roller Coaster experiments, ranging from unstable to very stable atmospheric conditions; the agreement of the model history curves with these experimental curves was within 10%.

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

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OSTI as DE98057450

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  • Other Information: PBD: 1 Oct 1997

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  • Other: DE98057450
  • Report No.: UCRL-ID--128733-Rev.1
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/302869 | External Link
  • Office of Scientific & Technical Information Report Number: 302869
  • Archival Resource Key: ark:/67531/metadc681218

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  • October 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 17, 2016, 7:22 p.m.

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Kansa, E.J. Time-dependent buoyant puff model for explosive sources, report, October 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc681218/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.