Numerical Simulation of Nano-Particle Deposition in Rectangular Duct with Flat Plate Fin

In this work, a study was carried out to compare the filtering and hydrodynamic properties of granular filters with solid spherical granules and spherical granules with modifications in the form of micropores. We used the discrete element method (DEM) to construct the geometry of the filters. Models of granular filters with spherical granules with diameters of 3, 4, and 5 mm, and with porosity values of 0.439, 0.466, and 0.477, respectively, were created. The results of the numerical simulation are in good agreement with the experimental data of other authors. We created models of granular filters containing micropores with different porosity values (0.158–0.366) in order to study the micropores’ effect on the aerosol motion. The study showed that micropores contribute to a decrease in hydrodynamic resistance and an increase in particle deposition efficiency. There is also a maximum limiting value of the granule microporosity for a given aerosol particle diameter when a further increase in microporosity leads to a decrease in the deposition efficiency.

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Numerical Simulation for Microconvection Around Nano-Particle With Brownian Motion in Liquid

Heat Transfer: Volume 1 ◽

10.1115/ht2003-47347 ◽

2003 ◽

Author(s):

B. X. Wang ◽

H. Li ◽

X. F. Peng ◽

L. X. Yang

Keyword(s):

Heat Transfer ◽

Numerical Simulation ◽

Brownian Motion ◽

Numerical Model ◽

Temperature Gradient ◽

Transfer Process ◽

Heat Transfer Process ◽

Nano Particles ◽

Analytic Method ◽

Nano Particle

The development of a numerical model for analyzing the effect of the nano-particles’ Brownian motion on the heat transfer is described. By using the Maxwell velocity distribution relations to calculate the most possible velocity of fluid molecules at certain temperature gradient location around the nano-particle, the interaction between fluid molecules and one single nano-particle is analyzed and calculated. Based on this, a syntonic system is proposed and the coupled effect that Brownian motion of nano-particles has on fluid molecules is simulated. This is used to formulate a reasonable analytic method, facilitating laboratory study. The results provide the essential features of the heat transfer process, contributed by micro-convection to be considered.

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Numerical Simulation of Solidification of Two Metal Droplets Impinged on Flat Plate Using Particle-based Method

The Proceedings of the Fluids engineering conference ◽

10.1299/jsmefed.2020.os11-04 ◽

2020 ◽

Vol 2020 (0) ◽

pp. OS11-04

Author(s):

Ryuya MURATA ◽

Koji FUKUDOME ◽

Makoto YAMAMOTO

Keyword(s):

Numerical Simulation ◽

Flat Plate ◽

Metal Droplets

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Preparation Technique of Single-Phase Silicon Borides Films for Nano Particle Deposition by Laser Ablation.

The Review of Laser Engineering ◽

10.2184/lsj.28.359 ◽

2000 ◽

Vol 28 (6) ◽

pp. 359-364

Author(s):

Kaoru SUZUKI ◽

Takemi URUNO ◽

Junji NAKATA

Keyword(s):

Laser Ablation ◽

Particle Deposition ◽

Single Phase ◽

Preparation Technique ◽

Nano Particle

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Numerical Simulation of Powder Dispersion Performance by Different Mesh Types

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.680.82 ◽

2016 ◽

Vol 680 ◽

pp. 82-85

Author(s):

Jian Cai ◽

Lan Chen ◽

Umezuruike Linus Opara

Keyword(s):

Numerical Simulation ◽

Flow Field ◽

Fine Particle ◽

Particle Deposition ◽

Tetrahedral Mesh ◽

Computational Time ◽

Kinetic Characteristics ◽

Powder Dispersion ◽

Simulation Results ◽

Time Accuracy

OBJECTIVE To investigate the influence of mesh type on numerical simulating the dispersion performance of micro-powders through a home-made tube. METHODS With the computational fluid dynamics (CFD) method, a powder dispersion tube was meshed in three different types, namely, tetrahedral, unstructured hexahedral and prismatic-tetrahedral hybrid meshes. The inner flow field and the kinetic characteristics of the particles were investigated. Results of the numerical simulation were compared with literature evidences. RESULTS The results showed that using tetrahedral mesh had the highest computational efficiency, while employing the unstructured hexahedral mesh obtained more accurate outlet velocity. The simulation results of the inner flow field and the kinetic characteristics of the particles were slightly different among the three mesh types. The calculated particle velocity using the tetrahedral mesh had the best correlation with the changing trend of the fine particle mass in the first 4 stages of the new generation impactor (NGI) (R2 = 0.91 and 0.89 for powder A and B, respectively). Conclusions Mesh type affected computational time, accuracy of simulation results and the prediction abilities of fine particle deposition.

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