RADFLO physics and algorithms

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This paper describes the history, physics, and algorithms of the computer code RADFLO and its extension HYCHEM. RADFLO is a one-dimensional, radiation-transport hydrodynamics code that is used to compute early-time fireball behavior for low-altitude nuclear bursts. The primary use of the code is the prediction of optical signals produced by nuclear explosions. It has also been used to predict thermal and hydrodynamic effects that are used for vulnerability and lethality applications. Another closely related code, HYCHEM, is an extension of RADFLO which includes the effects of nonequilibrium chemistry. Some examples of numerical results will be shown, along with scaling expressions ... continued below

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53 p.

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Symbalisty, E.M.D.; Zinn, J. & Whitaker, R.W. September 1, 1995.

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Description

This paper describes the history, physics, and algorithms of the computer code RADFLO and its extension HYCHEM. RADFLO is a one-dimensional, radiation-transport hydrodynamics code that is used to compute early-time fireball behavior for low-altitude nuclear bursts. The primary use of the code is the prediction of optical signals produced by nuclear explosions. It has also been used to predict thermal and hydrodynamic effects that are used for vulnerability and lethality applications. Another closely related code, HYCHEM, is an extension of RADFLO which includes the effects of nonequilibrium chemistry. Some examples of numerical results will be shown, along with scaling expressions derived from those results. We describe new computations of the structures and luminosities of steady-state shock waves and radiative thermal waves, which have been extended to cover a range of ambient air densities for high-altitude applications. We also describe recent modifications of the codes to use a one-dimensional analog of the CAVEAT fluid-dynamics algorithm in place of the former standard Richtmyer-von Neumann algorithm.

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53 p.

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OSTI as DE96000892

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  • Other Information: PBD: Sep 1995

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  • Other: DE96000892
  • Report No.: LA--12988-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/110714 | External Link
  • Office of Scientific & Technical Information Report Number: 110714
  • Archival Resource Key: ark:/67531/metadc622011

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 26, 2016, 3:53 p.m.

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Symbalisty, E.M.D.; Zinn, J. & Whitaker, R.W. RADFLO physics and algorithms, report, September 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc622011/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.