EHD in dusty and dirty plasmas and in unconventional plasmas particularly involving discharge and ionization distinct from HD and MHD

Summary form only given, as follows. Electrohydrodynamics (EHD) has actually been founded and developed as a continuum with a base of gravito-electrodynamics for dusty and dirty plasmas and unconventional plasmas (collisionless or collisional) in a broadest sense that may involve acceleration, electrical discharge, ionization, charging, electrification, or recombination, since there has been almost nothing in contents, though its term appeared occasionally, while hydrodynamics (HD) and magnetohydrodynamics (MHD) have been well established for nonionized fluids and conducting plasmas Electric forces are newly exerted on EHD fluids, producing electric pressure in addition to mechanical, viscous and magnetic forces, gas/plasma and magnetic pressure in HD and MHD. EHD fluids hold space charge and displacement currents and are regarded a dielectric or semiconducting fluid in contrast to non-ionized HD or conducting MHD plasmas. EHD gives rise to a new equation of electric field transport in addition to fluid vortex transport (HD) and magnetic field transport (MHD), though their equations have to be supplemented by additional terms related to space charge and electric fields, and is characterized by a new electric Reynolds number, with spatial and temporal factors in addition to the fluid Reynolds number, and the magnetic Reynolds number.