Studies of parallel algorithms for the solution of a Fokker-Planck equation

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The study of laser-created plasmas often requires the use of a kinetic model rather than a hydrodynamic one. This model change occurs, for example, in the hot spot formation in an ICF experiment or during the relaxation of colliding plasmas. When the gradients scalelengths or the size of a given system are not small compared to the characteristic mean-free-path, we have to deal with non-equilibrium situations, which can be described by the distribution functions of every species in the system. We present here a numerical method in plane or spherical 1-D geometry, for the solution of a Fokker-Planck equation that ... continued below

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39 p.

Creation Information

Deck, D. & Samba, G. November 1, 1995.

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  • Deck, D. Los Alamos National Lab., NM (United States)
  • Samba, G. CEA/CEL-V, Villeneuve St. Georges (France). Dept. de Mathematiques Appliquees

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Description

The study of laser-created plasmas often requires the use of a kinetic model rather than a hydrodynamic one. This model change occurs, for example, in the hot spot formation in an ICF experiment or during the relaxation of colliding plasmas. When the gradients scalelengths or the size of a given system are not small compared to the characteristic mean-free-path, we have to deal with non-equilibrium situations, which can be described by the distribution functions of every species in the system. We present here a numerical method in plane or spherical 1-D geometry, for the solution of a Fokker-Planck equation that describes the evolution of stich functions in the phase space. The size and the time scale of kinetic simulations require the use of Massively Parallel Computers (MPP). We have adopted a message-passing strategy using Parallel Virtual Machine (PVM).

Physical Description

39 p.

Notes

INIS; OSTI as DE96008935

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  • Other Information: PBD: Nov 1995

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  • Other: DE96008935
  • Report No.: LA--13032
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/221025 | External Link
  • Office of Scientific & Technical Information Report Number: 221025
  • Archival Resource Key: ark:/67531/metadc669073

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Creation Date

  • November 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Feb. 29, 2016, 7:42 p.m.

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Deck, D. & Samba, G. Studies of parallel algorithms for the solution of a Fokker-Planck equation, report, November 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc669073/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.