Charged Cavitation Bubble Dynamics
Coupled effects of interfacial charge, electric fields, and rapid bubble motion.
Background
Cavitation bubbles undergo rapid growth and collapse, producing strong local changes in pressure, temperature, and interfacial motion. When electrical charge or an external electric field is present, electrostatic stresses may interact with these transient dynamics.
Research questions
- How does interfacial charge evolve during bubble growth and collapse?
- Under which conditions do electric fields measurably alter bubble shape, motion, or collapse behavior?
- How can electrical effects be separated from pressure-driven and phase-change effects?
Methods
The research combines controlled bubble generation, time-resolved optical imaging, synchronized electrical measurements, and physical modeling. Comparisons across electrical and hydrodynamic conditions are used to isolate coupled effects without assuming a specific mechanism in advance.
Significance
A quantitative description of charged bubble dynamics can support the interpretation and control of electrically influenced cavitation systems. It may also provide a basis for evaluating when charge-related effects are important relative to conventional bubble dynamics.