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A low-voltage spark-discharge method for generation of consistent oscillating bubbles.
B H T Goh1, Y D A Oh, E Klaseboer
1NUS Graduate School for Integrative Sciences and Engineering, Singapore 117456, Singapore.
Researchers developed a new low-voltage underwater spark-discharge method. This technique allows for consistent control over cavitation bubble size, aiding studies in material processing and fluid dynamics.
Area of Science:
- Physics
- Fluid Dynamics
- Materials Science
Background:
- Underwater spark-discharge is used in material processing, water treatment, and cavitation bubble dynamics.
- Precise control of bubble size in spark-discharge methods is challenging.
- Understanding non-spherical bubble dynamics requires controlled bubble generation.
Purpose of the Study:
- To present a novel low-voltage underwater spark-discharge method.
- To achieve consistent control over spark-generated bubble size.
- To investigate the relationship between circuit resistance and bubble size.
Main Methods:
- Utilized a low-voltage (60.0 V) underwater spark-discharge system.
- Employed a metal-oxide-semiconductor field-effect transistor for discharge control.
- Generated oscillating cavitation bubbles repeatedly.
Main Results:
- Successfully generated oscillating bubbles with a consistent maximum radius.
- Demonstrated the feasibility of precise bubble size control.
- Observed a dependency between total circuit resistance and spark-generated bubble size.
Conclusions:
- The novel low-voltage method offers improved control over cavitation bubble generation.
- Consistent bubble size generation facilitates detailed studies of bubble dynamics.
- Circuit resistance is a key factor influencing spark-generated bubble size.
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