Fig. 21: Various reactor geometries where the discharge is in liquid or in contact with liquid that have been proposed.

a–d Reactor geometries for the generation of NTP inside the liquid: a point-plate, b point-point, c point-plate with bubbling gas, d wire-to plate. e–h Varying reactor geometries for the generation of NTP above the liquid are shown: e point-to-plate, f DBD with falling liquid film, g gliding arc above liquid, h wire-to-plate153.