Hybrid fluid/kinetic model for parallel heat conduction

It is argued that in order to use fluid-like equations to model low frequency (ω < ν) phenomena such as neoclassical tearing modes in low collisionality (ν < ωb) tokamak plasmas, a Chapman-Enskog-like approach is most appropriate for developing an equation for the kinetic distortion (F) of the distribution function whose velocity-space moments lead to the needed fluid moment closure relations. Further, parallel heat conduction in a long collision mean free path regime can be described through a combination of a reduced phase space Chapman-Enskog-like approach for the kinetics and a multiple-time-scale analysis for the fluid and kinetic equations