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Electrical Discharge in a Cavitating Liquid under an Ultrasound Field
T Karabassov1, A S Vasenko1,2, V M Bayazitov3
1HSE University, 101000 Moscow, Russia.
The Journal of Physical Chemistry Letters
|November 30, 2023
Summary
A theoretical model explains how electric fields create vapor microchannels in liquids, optimizing water treatment devices. This research supports the use of electrical discharges in cavitation for improved performance.
Area of Science:
- Physics
- Plasma Science
- Fluid Dynamics
Background:
- Electrical discharges in liquids, particularly cavitating liquids, are complex phenomena.
- Understanding these discharges is crucial for optimizing applications like water treatment.
- Previous models have not fully captured the interplay between cavitation and electrical discharge dynamics.
Purpose of the Study:
- To develop and validate a theoretical model for electrical discharges in cavitating liquids.
- To investigate the role of electric fields in forming vapor microchannels.
- To optimize the design and performance of a water treatment device.
Main Methods:
- Development of a theoretical model based on the Noltingk-Neppiras equation.
- Comparison of theoretical calculations with experimental data.
- Experimental setup involving a hydrodynamic emitter and high-frequency electrical impulses.
Main Results:
- The model supports the hypothesis that electric fields promote vapor microchannel formation.
- Paschen's conditions for discharge rupture and maintenance were found to be fulfilled in these microchannels.
- Theoretical analysis showed qualitative agreement with experimental results from the water treatment device.
Conclusions:
- The developed theoretical model provides insights into electrical discharge mechanisms in cavitating liquids.
- Electric field-induced vapor microchannels are key to the discharge process.
- The findings contribute to the optimization of plasma-based water treatment technologies.
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