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Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
Published on: August 5, 2020
Investigations into ultrasound induced atomization
Kiran A Ramisetty1, Aniruddha B Pandit, Parag R Gogate
1Chemical Engineering Department, Institute of Chemical Technology, Mumbai 40019, India.
Ultrasonics Sonochemistry
|June 8, 2012
Summary
This study investigates ultrasonic atomization, revealing that higher frequency and viscosity reduce droplet size. Increased ultrasound intensity broadens the droplet size distribution, aiding parameter selection for desired outcomes.
Area of Science:
- Fluid dynamics
- Acoustics
- Materials science
Background:
- Ultrasonic atomizers are crucial for generating fine droplets.
- Understanding droplet size distribution is key for optimizing atomization processes.
- Controlling droplet size impacts various applications, from spray coatings to medical inhalers.
Purpose of the Study:
- To analyze droplet size distribution in ultrasonic atomization.
- To determine the influence of equipment and operating parameters on droplet size.
- To elucidate the mechanistic details of droplet formation and ejection.
Main Methods:
- Photographic analysis was employed to capture droplet formation and measure size.
- Droplet velocity was quantified by analyzing motion streaks.
- Systematic variation of operating parameters (frequency, power, flow rate, viscosity) was performed.
Main Results:
- Droplet size decreases with increasing atomizer frequency.
- Higher ultrasound intensity leads to a broader droplet size distribution.
- Increased fluid viscosity results in smaller droplet sizes.
- Mechanistic insights into instability growth and droplet ejection were gained.
Conclusions:
- Established the relationship between operating parameters and droplet size distribution.
- Provided a mechanistic understanding of ultrasonic atomization.
- Developed an empirical correlation for predicting droplet size based on operational and liquid properties.
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