Collisional delta-[ital f] scheme with evolving background for transport time scale simulations
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543--0451 (United States)
The [delta]f approach is extended for simulating the transport time-scale evolution of near-Maxwellian distributions in collisional plasmas. This involves simultaneously advancing weighted marker particles for representing the intrinsically kinetic component [delta]f, and fluid equations for the parameters of the shifted Maxwellian background f[sub SM]. The issue of increasing numerical noise in a collisional [delta]f algorithm, due to marker particle weight spreading, is addressed in detail, and a solution to this problem is proposed. To obtain higher resolution in critical regions of phase space, a practical procedure for implementing sources and sinks of marker particles is developed. As a proof of principal, this set of methods is applied for computing electrical Spitzer conductivity as well as collisional absorption in a homogeneous plasma. [copyright] [ital 1999 American Institute of Physics.]
- OSTI ID:
- 5901769
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Vol. 6:12; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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