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Titolo:
SIMULATION OF THE HELIOSPHERE - MODEL
Autore:
MCNUTT RL; LYON J; GOODRICH CC;
Indirizzi:
JOHNS HOPKINS UNIV,APPL PHYS LAB,JOHNS HOPKINS RD LAUREL MD 20723 DARTMOUTH COLL,DEPT PHYS & ASTRON HANOVER NH 03755 UNIV MARYLAND,DEPT ASTRON COLLEGE PK MD 20742
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A2, volume: 103, anno: 1998,
pagine: 1905 - 1912
SICI:
2169-9380(1998)103:A2<1905:SOTH-M>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOCAL INTERSTELLAR-MEDIUM; SOLAR-WIND; HYDROGEN; ATOMS; COLLISIONS; INTERFACE; SYSTEM; GAS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
R.L. Mcnutt et al., "SIMULATION OF THE HELIOSPHERE - MODEL", J GEO R-S P, 103(A2), 1998, pp. 1905-1912

Abstract

The problem of the interaction of the solar wind with the very local interstellar medium (VLISM) is complicated by the role played by collisions between the plasma components of the heliosphere and VLISM and the neutral component of the VLISM. We outline the inherent approximations in fluid descriptions of the problem and give formulas for the near-exact charge exchange and elastic collision transfer integrals for particles, momentum and energy for two drifting Maxwellians with different drift speeds and temperatures. To lowest order, all Boltzmann collision operators can be evaluated analytically in terms of exponentialsand error functions. Analytic approximations that have relative errors of less than 2.62% compared with the exact expressions can be implemented in large simulation codes. Our formulation avoids approximationsused previously by others and leads to a simplification of the formulation and increased accuracy for numerical simulations of the heliosphere/VLISM interaction.

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Documento generato il 05/12/20 alle ore 13:49:37