Two-Dimensional Integrated Model for Interaction of Liquid Droplets with Atmospheric Pressure Plasma

Interaction between the liquid precursor droplets and non‐equilibrium atmospheric pressure plasma (APP) is identified as an important mechanism in two‐phase flow. In this study, a two‐dimensional integrated fluid‐droplet model is developed to explore the behavior of this interaction under similar operating conditions of an experiment performed using PlasmaStream system. The evaporation of droplets is recognized as a primary mechanism in APP; however, the mutual interactions, such as grazing and coalescence between the droplets are dominant in the limit of higher precursor flow rates (>100 μL min−1). The spatio‐temporal profiles of discharge plasma are contrasted by considering the effect of various liquid precursors, such as Hexamethyldisiloxane (HMDSO), nHexane, Tetraethyl orthosilicate and water in order to illustrate their significance during droplet‐plasma interaction. In particular, we investigated the enhancement of evaporation of droplets by the increment of gas flow rates. Finally, the size distribution of HMDSO droplets measured with the experiment is compared with the results of the fluid‐droplet model to provide the authenticity of numerical simulation outcomes. Interaction between liquid droplets and atmospheric pressure plasma is identified as an important mechanism. A two‐dimensional integrated fluid‐droplet model is developed to explore the behavior of this interaction. The grazing and coalescence of droplets are explored in plasma. The profiles of discharge plasma are contrasted by introducing various precursors, such as Hexamethyldisiloxane, nHexane, Tetraethyl orthosilicate and water in PlasmaStream system.