Obtaining gigaflop performance from particle simulation of plasmas [electronic resource]
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| Online Access: |
Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Defense ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1990.
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| Subjects: |
| Abstract: | In the numerical simulation of plasma phenomena there are two fundamental approaches that are generally followed. In the continuum approach one models the evolution of the fluid moment equations derived from the appropriate Boltzmann equation of the plasma. Alternatively, in the particle approach a large group of simulated charged particles are moved according to the self-consistent electromagnetic fields which partly depend on the charge and current densities of these same particles. Although the particle simulation method has been traditionally the more expensive of the two, it is much more capable of giving adequate account of many important kinetic phenomena. With the advent of the vector multiprocessor supercomputers, such as the Cray-2 or Cray Y-MP, we have learned to adapt particle simulation codes to exploit the parallel features of these machines. Yet, in spite of such developments, the particle simulation codes have remained much slower than the maximum machine speeds. We have investigated new techniques that further optimize these methods to bring the speeds of these particle simulations into the gigaflop range. Recent progress in this area suggests that the use of particle simulation methods will become competitive with the alternative fluid models especially when it is realized that gigaflop performance makes them much more affordable. 2 refs., 3 tabs. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 06/01/1990. "ucrl-jc-104063" " conf-9010439--1" "DE92003016" 5. international symposium on science and engineering on Cray research computers, London (United Kingdom), 22-24 Oct 1990. Anderson, D.V.; Shumaker, D.E.; Curtis, B.C.; Horowitz, E.J. |
| Physical Description: | Pages: (13 p) : digital, PDF file. |