Parallel plasma pressure
= Parallel plasma pressure
{title2=$p_\parallel=m\int(v_\parallel-u_\parallel)^2f\,d^3v$}
The normal <stress> along the local <magnetic field>, evaluated using the random parallel <velocity>. At zero equilibrium mean flow, its linear perturbation is obtained from $m\int v_\parallel^2\delta f\,d^3v$ together with the perturbation of the <velocity-space measure>.