electron_vpa_advection
moment_kinetics.electron_vpa_advection — Modulemoment_kinetics.electron_vpa_advection.electron_vpa_advection! — Methodcalculate the wpa-advection term for the electron kinetic equation = (vthe / 2 pe * dpe/dz + wpa / 3 pe * dqpare/dz - wpa^2 * dvthe/dz) * df/dwpa
moment_kinetics.electron_vpa_advection.update_electron_speed_vpa! — Methodcalculate the electron advection speed in the wpa-direction at each grid point