Numerical Simulation of Non-Spherical Submicron Particle Acceleration and Focusing in a Converging–Diverging Micronozzle
Abstract
:1. Introduction
2. Model Formulation
3. Numerical Procedure
4. Validation of Solvers
5. Results and Discussion
5.1. Flow Field Characteristics in the Micronozzle
5.2. Distributions of Non-Spherical Submicron Particle Velocity
5.3. Effect of the Diffusion of Submicron Particles
6. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Authors | Particle Size | Method | Findings |
---|---|---|---|
Israel et al. [5] | 0.12–1.3 μm | Experiment | 1. Aerosol focusing is the result of the inertial effect. 2. Particle velocity is up to 190 m/s. |
Akhatov et al. [8] | 100 μm | Experiment and a mathematical model | The Saffman force acting on aerosol particles becomes significant, causing a noticeable migration of particles toward the center line of the capillary. |
Bhattacharya et al. [9] | 2–6 μm | CFD numerical simulation | 1. The influence of the Magnus force on 2 μm diameter particles can be ignored compared with the Saffman lift force. 2. A silver particle velocity of 600 m/s can be reached and the aerosol beam width is as thin as 50 µm. |
Kudryavtsev et al. [3] | 0.05–5.0 μm | CFD numerical simulation | Particle beam collimation occurred in two different ranges of particle sizes for the plane-shaped and axisymmetrical nozzle. |
Shershnev and Kudryavtsev [10] | 0.05–5.0 μm | CFD numerical simulation | Particle beam collimation occurred in two different ranges of particle sizes in the nozzle with a rectangular cross-section. |
Particle Shape | Model | Shape Factor (Sf) | |
---|---|---|---|
Sphere | | 1 | |
Cube | | 0.806 | |
Disk-like | (h = r) | | 0.827 |
(h = r/3) | 0.594 | ||
(h = r/10) | 0.323 | ||
Rod-like | (h = 3r) | | 0.86 |
(h = 10r) | 0.691 | ||
(h = 20r) | 0.580 |
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Wang, Y.; Shen, J.; Yin, Z.; Bao, F. Numerical Simulation of Non-Spherical Submicron Particle Acceleration and Focusing in a Converging–Diverging Micronozzle. Appl. Sci. 2022, 12, 343. https://doi.org/10.3390/app12010343
Wang Y, Shen J, Yin Z, Bao F. Numerical Simulation of Non-Spherical Submicron Particle Acceleration and Focusing in a Converging–Diverging Micronozzle. Applied Sciences. 2022; 12(1):343. https://doi.org/10.3390/app12010343
Chicago/Turabian StyleWang, Yanru, Jiaxin Shen, Zhaoqin Yin, and Fubing Bao. 2022. "Numerical Simulation of Non-Spherical Submicron Particle Acceleration and Focusing in a Converging–Diverging Micronozzle" Applied Sciences 12, no. 1: 343. https://doi.org/10.3390/app12010343