Linear delta-f simulations of nonlocal electron heat transport

Brunner, S. ; Valeo, E. ; Krommes, J.A.

Princeton University. Plasma Physics Laboratory.

关键词: Heat Transfer;    70 Plasma Physics And Fusion;    Calculation Methods;    Plasma Simulation;    Fokker-Planck Equation;   

DOI  :  10.2172/750428
RP-ID  :  PPPL--3427
RP-ID  :  AC02-76CH03073
RP-ID  :  750428

美国|英语

来源: UNT Digital Library

【 摘 要 】

Nonlocal electron heat transport calculations are carried out by making use of some of the techniques developed previously for extending the delta f method to transport time scale simulations. By considering the relaxation of small amplitude temperature perturbations of a homogeneous Maxwellian background, only the linearized Fokker-Planck equation has to be solved, and direct comparisons can be made with the equivalent, nonlocal hydrodynamic approach. A quasineutrality-conserving algorithm is derived for computing the self-consistent electric fields driving the return currents. In the low-collisionality regime, results illustrate the importance of taking account of nonlocality in both space and time.