a numerical study of particle dispersion in mixing layer

A numerical study of particle dispersion in mixing layer ...

Oct 01, 1992  A quasi-two-dimensional large scale vortex structure has a dominant effect on the development of a plane mixing layer. Results of a simulation of particle dispersion in free shear flows show that the experimental observations indicating particle dispersion rates greater than the fluid dispersion rates in free shear layers could be attributed to the effect of a large scale vortex structure

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Numerical Prediction of Particle Dispersion in a Mixing ...

paper, the dispersion of solid particles in a mixing layer is computed and the predictions are compared with the data of Hishida et. al. (1992). The effect of particle inertia on the response functions will be assessed from the results for the 3 particle sizes used in the experiments. Likewise, the effect of

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Numerical simulation of particle dispersion in the ...

turbulent structures of the planar mixing layer to the particle dispersion and its correlation has been studied in [7-9]. There are two approaches in numerical study of a two-phase flow. In the first method, discrete elements are tracked through a continuous fluid by solving the system of

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Numerical Simulation of Particle Dispersion in a Spatially ...

Although there have been several numerical studies on particle dispersion in mixing layers, most of them have been conducted for temporally evolving mixing layers. In this study, numerical simula-tions of a spatially developing mixing layer are performed to investigate particle dispersion

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Numerical Simulation of Particle Dispersion in a Spatially ...

10%  Although there have been several numerical studies on particle dispersion in mixing layers, most of them have been conducted for temporally evolving mixing layers. In this study, numerical simulations of a spatially developing mixing layer are performed to investigate particle dispersion under various conditions. The full compressible Navier--Stokes equations are solved with

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a Study on Particle Dispersion in Two-Dimensional Mixing ...

The study of solid particle dispersion in mixing layer flows is undertaken to improve the understanding of technological processes and natural phenomena. Mixing layer flows are characterized by large scale vortical structures which grow and interact in time. The particle dispersion model proposed by Crowe, Gore and Troutt (1985), which is based on the ratio of the particle aerodynamic response ...

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Research on particle dispersion in a plane mixing layer ...

Feb 01, 2004  10%  The numerical simulation with two-way coupling was performed in a liquid-particle mixing layer and the corresponding experiment study was made. In the process of vortex rolling up and vortices pairing, the particles with differentSt number have a very different pattern of dispersion. The mean velocity of particle withSt=1 is higher than that of the fluid phase on the low

get price

Numerical Prediction of Particle Dispersion in a Mixing ...

paper, the dispersion of solid particles in a mixing layer is computed and the predictions are compared with the data of Hishida et. al. (1992). The effect of particle inertia on the response functions will be assessed from the results for the 3 particle sizes used in the experiments. Likewise, the effect of

get price

a Study on Particle Dispersion in Two-Dimensional Mixing ...

The study of solid particle dispersion in mixing layer flows is undertaken to improve the understanding of technological processes and natural phenomena. Mixing layer flows are characterized by large scale vortical structures which grow and interact in time. The particle dispersion model proposed by Crowe, Gore and Troutt (1985), which is based on the ratio of the particle aerodynamic response ...

get price

Direct numerical simulation of particle dispersion in a ...

Nov 12, 2018  By direct numerical simulations, the particle dispersion is systematically investigated in a three-dimensional spatially developing compressible mixing layer. The

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Research on particle dispersion in a plane mixing layer ...

Feb 01, 2004  The numerical simulation with two-way coupling was performed in a liquid-particle mixing layer and the corresponding experiment study was made. In the process of vortex rolling up and vortices pairing, the particles with differentSt number have a very different pattern of dispersion. The mean velocity of particle withSt=1 is higher than that of the fluid phase on the low-speed side, and

get price

Numerical Study of the Particle Dispersion on a Supersonic ...

The numerical study of the two-dimensional supersonic hydrogen-air mixing in the free shear layer is performed. The system of the Favre-Averaged Navier-Stokes equations for multispecies flow is solved using the ENO scheme of the third order accuracy. The k-ε two-equation turbulence models with compressibility correction are applied to calculate the eddy viscosity coefficient.

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Numerical simulation of particle transport in supersonic ...

Direct numerical simulation (DNS) is a reliable tool and has been successfully used for compressibility effects in the turbulent shear layer [1], spatial mixing layers [2], single-phase and two-phase flows [3]. The particle dispersions in the mixing layers for the different Stokes numbers have been obtained in [4]. In that study it has

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Modelling of heavy and buoyant particle dispersion in a ...

Sep 25, 2007  Our numerical modelling results of heavy particle dispersion in a turbulent mixing layer are compared with the experimental study reported by Kobayashi et al. . The reasons for this are that the DVM used for investigating heavy particle dispersion in the turbulent mixing layer needs further validation against the experiments and the ...

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(PDF) Modelling of heavy and buoyant particle dispersion ...

Modelling of heavy and buoyant particle dispersion in a two-dimensional turbulent mixing layer. Powder Technology, 2007. Chris Rielly. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. ... Numerical Simulation of Particle Dispersion in a Spatially Developing Mixing Layer.

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Numerical study of dispersion of a rough dense layer of ...

Dec 28, 2017  Numerical study of dispersion of a rough dense layer of particles under the action of an expanding shock wave. T. A. Khmel’ 1 A. V. Fedorov 1 Combustion, Explosion, and Shock Waves volume 53, pages 696–704 (2017)Cite this article

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Direct numerical simulation of a three-dimensional ...

Understanding the effects of those large-scale structures on the dispersion of particles is very important. Using a pseudospectral method, the large-scale structures of a three-dimensional temporally developing mixing layer and the associated dispersion patterns of particles were simulated.

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CiteSeerX — Theoretical and Computational Fluid Dynamics ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. Although there have been several numerical studies on particle dispersion in mixing layers, most of them have been conducted for temporally evolving mixing layers. In this study, numerical simula-tions of a spatially developing mixing layer are performed to investigate particle dispersion under various ...

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Numerical study on super/hypersonic flow, mixing, and ...

Feb 18, 2016  Numerical study on super/hypersonic flow, mixing, and combustion phenomena, 2015 ... Three models can well predict the mean velocities of the particle phase. The particle dispersion is over-predicted by the conventional SSF model in the supersonic particle-laden boundary layer flow, while the improved SSF model is less predictable for the ...

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Review and Comparison of Numerical Simulations of ...

The formation of this mixing layer is influenced by the helical cell distribution and development. Mixing is enhanced with an increase in the discharge ratio accompanied by movement towards the outer bank and deformation of the mixing layer. In addition, mixing is affected by bed morphology through the shear layer formation, and contaminant ...

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Numerical Investigation of Droplet Properties of a Liquid ...

The atomization process of a liquid jet in supersonic crossflow with a Mach number of 1.94 was investigated numerically under the Eulerian-Lagrangian scheme. The droplet stripping process was calculated by the KH (Kelvin-Helmholtz) breakup model, and the secondary breakup due to the acceleration of shed droplets was calculated by the combination of the KH breakup model and the RT

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Research on particle dispersion in a plane mixing layer ...

Feb 01, 2004  The numerical simulation with two-way coupling was performed in a liquid-particle mixing layer and the corresponding experiment study was made. In the process of vortex rolling up and vortices pairing, the particles with differentSt number have a very different pattern of dispersion. The mean velocity of particle withSt=1 is higher than that of the fluid phase on the low-speed side, and

get price

Numerical Study of the Particle Dispersion on a Supersonic ...

The numerical study of the two-dimensional supersonic hydrogen-air mixing in the free shear layer is performed. The system of the Favre-Averaged Navier-Stokes equations for multispecies flow is solved using the ENO scheme of the third order accuracy. The k-ε two-equation turbulence models with compressibility correction are applied to calculate the eddy viscosity coefficient.

get price

Numerical simulation of particle transport in supersonic ...

Direct numerical simulation (DNS) is a reliable tool and has been successfully used for compressibility effects in the turbulent shear layer [1], spatial mixing layers [2], single-phase and two-phase flows [3]. The particle dispersions in the mixing layers for the different Stokes numbers have been obtained in [4]. In that study it has

get price

Modelling of heavy and buoyant particle dispersion in a ...

Sep 25, 2007  Our numerical modelling results of heavy particle dispersion in a turbulent mixing layer are compared with the experimental study reported by Kobayashi et al. . The reasons for this are that the DVM used for investigating heavy particle dispersion in the turbulent mixing layer needs further validation against the experiments and the ...

get price

The accumulation and dispersion of heavy particles in ...

The present study continues our computational investi- gation into the topic of particle dispersion by forced mixing layers. While part 1 (Martin and Meiburg,r hereafter referred to as MM) focused on the effect of the mixing layer alone, we now aim at identifying and quantifying the mechanisms

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Numerical study on super/hypersonic flow, mixing, and ...

Feb 18, 2016  Numerical study on super/hypersonic flow, mixing, and combustion phenomena, 2015 ... Three models can well predict the mean velocities of the particle phase. The particle dispersion is over-predicted by the conventional SSF model in the supersonic particle-laden boundary layer flow, while the improved SSF model is less predictable for the ...

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NUMERICAL SIMULATION OF PARTICLE TRANSPORT IN

Transport (FCT) algorithm [12, 131. The numerical model is first used to predict the evolution of the Kelvin-Helmholtz instability, including the formation and subsequent merging of large-scale vortices in the early development of the instabilities in the mixing layer. Then, at a specified time which is a parameter in the study, the particles ...

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Numerical simulation of gas-particle two-phase mixing ...

Jun 11, 2002  In this study, a two-dimensional gas-particle mixing layer under high mass loading ratio is simulated by the above-mentioned two-way vortex method. Air streams having velocities 13 and 4 m/s are introduced into the mixing region. Glass particles with diameter of 72 and 135 μm are loaded into the origin of the mixing layer.

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On the effect of nonuniform seeding on particle dispersion ...

Numerical simulations of the incompressible Navier–Stokes equations are then used to study cross-stream dispersion in a temporally evolving two-dimensional mixing layer. Stokes numbers St in the calculations were 0.05, 1, 10, and 100 where St is defined as the ratio of the particle response time to the time scale formed using the vorticity ...

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The accumulation and dispersion of heavy particles in ...

Jun 04, 1998  A scaling argument based on the idealization of the spatially periodic mixing layer as a row of point vortices shows that the formation of these concentrated particle streaks proceeds with optimum efficiency for St≂1. It thereby provides a quantitative basis for experimental and numerical observations of preferential particle dispersion at ...

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Simulation of particle dispersion in an axisymmetric jet ...

Particle dispersion in an axisymmetric jet is analysed numerically by following particle trajectories in a jet flow simulated by discrete vortex rings. Important global and local flow quantities reported in experimental measurements are successfully simulated by this method.

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Effects of nonreacting solid particle and liquid droplet ...

Oct 15, 2001  Numerical simulations are conducted of two-dimensional (2D) exothermic reacting mixing layers laden with either solid particles or evaporating liquid droplets. An irreversible reaction of the form ...

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CiteSeerX — Theoretical and Computational Fluid Dynamics ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. Although there have been several numerical studies on particle dispersion in mixing layers, most of them have been conducted for temporally evolving mixing layers. In this study, numerical simula-tions of a spatially developing mixing layer are performed to investigate particle dispersion under various ...

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Numerical Study on Desulfurization Behavior During Kanbara ...

Feb 19, 2021  The hot metal desulfurization in Kanbara Reactor (KR) metal treatment was simulated in this study via a transient-coupled 3D numerical model of the two-phase flow, heat transfer, and particle motion desulfurization processes. The KR impeller stirring was described via the multiple reference frame model. The volume of fluid approach was employed to capture the air-hot metal interface.

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