Session KP01 - Poster Session III.
POSTER session, Tuesday afternoon, March 23
Exhibit Hall, GWCC
There are two main strategies for simulating plasmas --- particle based and fluid moment based (e.g., magnetohydrodynamics, MHD). These two approaches may be converging: particle-based delta-f simulations are evolving from electrostatic to electromagnetic turbulence simulations where the electron momentum balance equation (Ohm's law) will become a very important, nonlinear player, particularly for magnetic reconnection processes; and MHD-like simulations are adding ''two-fluid" kinetic effects through kinetically-deduced closure relations. We propose that a natural framework for unifying these approaches for the future is to adopt an extended Chapman-Enskog-like approach [1] in which the (nonlinear) fluid moment equations are the basic equations and the needed closure relations are obtained from relevant moments of kinetic simulations of the non-fluid distortions of the distribution function. Some cases where such an approach may or may not be useful will be presented.
[1] J.P. Wang and J.D. Callen, Phys. Fl. 4, 1139 (1992). Z. Chang and J.D. Callen, Phys. Fl. B 4, 1167 (1992); 1182 (1992).