Simulation of plasma water interaction with discharge in the existing bubble in water

TL;DR

This study uses finite element simulations to analyze how plasma discharges in bubbles within water affect electron density, revealing key dependencies on voltage, frequency, dielectric thickness, and bubble size, which are crucial for plasma-activated water applications.

Contribution

It introduces a detailed FEM simulation approach for plasma discharge in water bubbles, exploring parameter effects on electron density and plasma-water interaction.

Findings

Electron density increases with voltage, frequency, and bubble radius.

Electron density decreases with increasing dielectric thickness.

High plasma density signifies strong plasma-water interaction.

Abstract

The plasma-liquid interaction is an important issue in plasma technology. The simulation of discharge in spherical bubbles in the water that produced plasma-activated water (PAW) is investigated using finite element methods (FEM) for a simulated 2D dielectric barrier discharge in three different geometries. The electron density changes with voltage, frequency, dielectric thickness, and bubble radius are investigated in different time duration. The results show that electron density increases linearly by increasing voltage, frequency and bubble radius, while it is vice versa for dielectric thickness. High plasma density indicates sufficient plasma-water interaction.