Figure 3
Distributions of (a,b) the x-component of the electric field (Ex), (c,d) the space charge density, and (e,f) the EHD force parallel to the dielectric surface for nine- and two-electrode cases. An 8-kV DC voltage combining 25-kHz negative 8-kV pulses was applied in the discharge simulation. Both Ex and space charge are positive above the grounded covered electrode, whereas Ex and space charge are negative above the high-voltage covered electrode in the nine-electrode case. Positive EHD force is generated above each covered electrode. The magnitude of Ex, the space charge, and the EHD force in the nine-electrode case is higher than in the two-electrode case because the exposed electrode on the downstream side absorbs the surface charge, enhancing the EHD force.
