Plasma-Liquid Interface Manipulated by Chamber Structure: An Experimental and Theoretical Approach

Area of Science:

• Plasma Physics
• Materials Science
• Chemical Engineering

Background:

• Plasmas are increasingly used for environmental remediation, material science, and biomedical therapies.
• Plasma-liquid interactions at the interface are critical for treatment efficacy.
• Current research focuses on understanding molecular transfers and chemical pathways.

Purpose of the Study:

• To investigate the influence of chamber structure on plasma-liquid interface dynamics.
• To explore how chamber geometry can manipulate plasma jet behavior and stability.
• To provide a theoretical and experimental basis for optimizing plasma-liquid treatments.

Main Methods:

• Experimental observation of plasma jet expansion in cylindrical and stepped-wall chambers.
• Derivation of momentum and energy equations for the plasma-liquid interface.
• Comparative analysis of interface propagation, symmetry, and stability.

Main Results:

• A stepped-wall chamber significantly shortens axial interface propagation and reduces plasma volume.
• The stepped-wall structure promotes a more symmetrical and stable plasma jet.
• Theoretical models confirm the role of chamber geometry in controlling interface behavior.

Conclusions:

• Chamber wall structure is a key factor in manipulating plasma-liquid interface characteristics.
• This control enables optimization of chemical reaction rates, stability, and expansion.
• Future applications may involve AI-controlled flexible walls for tailored plasma treatments.