Microplasma actuator for EHD induced flow

Dielectric Barrier Discharge microplasma actuator energized at low discharge voltage of about 1 kV was applied for flow modification. The movement of incense particles was tracked by the high speed camera. A modulated AC voltage was applied to electrodes. Due to the microplasma generation, the flow velocity showed different characteristics at various duty ratios of the applied voltage. The observation with the high speed camera showed at various time intervals the modification of the flow by the microplasma. The numerical simulation of the flow was carried out using fluid model which assumed that the electric potential could be split in the potential by the external electric field and the charge density of plasma. Furthermore the body-force was determined by calculating the potential. The body force was implemented in the Navier-Stokes equations and the simulated flow was obtained. The numerical results matched the obtained results in experiments.