Instant switching control between two types of plasma-driven liquid flows

Abstract

Plasma-driven liquid flows that are generated in bulk liquid by plasma irradiation are one of the key factors in understanding the interaction between plasma and liquid. In this work, the direction of the plasma-driven liquid flow was successfully switched and controlled only by changing the frequency of argon plasma jet generation. The liquid flow could switch in the opposite direction within 3 s after the frequency change. Changes in the emission spectra with frequency have an important effect on the liquid flows, with results from current waveforms indicating that the frequency also changes the characteristics of the plasma jet.