Particle transport in a small square enclosure in laminar natural convection

Akbar, Muhammad; Rahman, Mosfequr; Ghiaasiaan, S. Mostafa

doi:10.1016/j.jaerosci.2009.04.007

Cited by 35 publications

(25 citation statements)

References 28 publications

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“…They focused on the performance of v 2 -f turbulence model and made comparison with the experimental data and DNS results. Akbar et al (2009) also performed a numerical study of particle motions in a differentially heated cavity. They investigated transport mechanism of 50 nm to 1 µm particles in laminar flow regimes with the Rayleigh number in the range of 10 2 to 8 × 10 5 .…”

Section: Introductionmentioning

confidence: 99%

Simulation of Solid Particles Behavior in a Heated Cavity at High Rayleigh Numbers

Bagheri

Salmanzadeh

Golkarfard

et al. 2012

Aerosol Science and Technology

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Transport and deposition of solid particles in a differentially heated cavity at high Rayleigh numbers up to 10 8 was studied using an Eulerian-Lagrangian computational method. Two-dimensional Navier-Stokes and energy equations were solved and the motions of particles with diameters in the range of 10 nm to 10 µm were simulated. Effects of drag, lift, thermophoresis and Brownian forces on the particle trajectories were investigated. It was observed that the variation of Rayleigh number can significantly change the flow field and the corresponding particle deposition patterns. In particular, recirculation regions were formed near the corners as the Rayleigh number increased. Furthermore, the effects of changes in the Rayleigh numbers on transport and deposition of particles of different sizes were quite different. Increasing Rayleigh number from 10 7 to 10 8 caused a decrease in particles deposition except for 10 µm particles. Smaller particles had a higher probability to deposit on the cold wall as the thermophoresis effect becomes important. Increasing the Rayleigh number decreased the influencing zone of the thermophoresis in the vicinity of the walls.

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Section: Introductionmentioning

confidence: 99%

Simulation of Solid Particles Behavior in a Heated Cavity at High Rayleigh Numbers

Bagheri

Salmanzadeh

Golkarfard

et al. 2012

Aerosol Science and Technology

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“…Newtonian fluid and two-dimensional flow, Thermophysical properties are constant except for the air density which varies according to the Boussinesq approximation, Following [10,11,29], it is assumed that for such low volume fractions of solid particles considered here the particles have negligible effects on the flow field, The initially stagnant particles are distributed randomly in the cavity, Local thermal equilibrium between the particle and air, Particles are sticky, i.e. they will stick to the surface when they come in contact with the walls [15,19].…”

Section: Problem Statementmentioning

confidence: 99%

“…particle deposition on heat exchanger surfaces can reduce the heat transfer rate and adversely affect the energy efficiency of these equipment [8,9]. Therefore, several studies have been carried out to understand this problem using Eulerian-Lagrangian methods [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Eulerian–Lagrangian analysis of solid particle distribution in an internally heated and cooled air-filled cavity

Garoosi

Safaei

Dahari

et al. 2015

Applied Mathematics and Computation

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“…Akbar et al [3] studied the behavior of sub-micron particles in a laminar free convection in a square enclosure. Thatcher et al [4] investigated particle deposition mechanism in a closed cavity experimentally.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of deposition and dispersion of aerosols in a concentric annulus

Ganj¹,

Khaki²,

Gerailinejad³

2017

ntmsci

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Abstract:In the present analysis, we studied numerically the effect of natural convection on deposition and dispersion of aerosols in a concentric horizontal annulus by means of control volume based finite element method. The governing equation is assumed for laminar, incompressible and 2D fluid flow while a Lagrangian description was used for simulation of spherical, solid particles immersed in the flow. The inner cylinder was under a constant heat flux and the outer one was maintained at a constant temperature (T c ). The Drag, Lift, Brownian and gravity forces were considered in the equation of particle motion. The results showed that Rayleigh number and increment of the aspect ratio change the rate of deposition as showed in the figures.

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Particle transport in a small square enclosure in laminar natural convection

Cited by 35 publications

References 28 publications

Simulation of Solid Particles Behavior in a Heated Cavity at High Rayleigh Numbers

Simulation of Solid Particles Behavior in a Heated Cavity at High Rayleigh Numbers

Eulerian–Lagrangian analysis of solid particle distribution in an internally heated and cooled air-filled cavity

Numerical investigation of deposition and dispersion of aerosols in a concentric annulus

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