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A Multiscale Simulation and Experimental Study on the Microfog Evolution and Dust Control Mechanism Driven by
Zhongan Jiang1, Mingli Si1, Fabin Zeng1,2
1School of Resources and Safety Engineering, University of Science and Technology Beijing, Beijing 100083, China.
ACS Omega
|February 23, 2026
Summary
Ultrasonic atomization effectively suppresses coal dust in mines. Optimal conditions vary for dust capture versus surface wetting, achieving up to 80% efficiency.
Area of Science:
- Mining Engineering
- Environmental Science
- Aerosol Science
Background:
- Coal dust pollution poses significant health and safety risks in open-pit mines.
- Effective dust control is crucial for regulatory compliance and worker well-being.
Purpose of the Study:
- To investigate the dynamics of microdroplets generated by ultrasonic atomization.
- To elucidate the dust suppression mechanisms of ultrasonic atomization in coal mines.
- To optimize operating parameters for efficient dust control.
Main Methods:
- Theoretical analysis of ultrasonic atomization principles.
- Macroscopic spray experiments to study gas-liquid flow and droplet velocity.
- Microscopic numerical simulations to model atomization dynamics.
- Correlation analysis to establish relationships between pressure and flow/velocity.
Main Results:
- Established power-law correlations for gas-liquid flow ratio and droplet velocity based on gas and liquid pressures.
- Determined optimal operating conditions for different dust suppression scenarios (near-field capture vs. surface wetting).
- Achieved high dust suppression efficiencies (approx. 80% total dust, 75% respirable dust) in field applications.
Conclusions:
- Ultrasonic atomization offers a viable solution for coal dust pollution in mining.
- Understanding droplet dynamics and optimizing pressure parameters are key to effective dust control.
- This research provides practical guidance for developing efficient, low-water dust mitigation technologies.
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