Experimental and theoretical study of the distribution of mass concentration of solid particles in the two-phase laminar boundary layer on a flat plate

Hussainov, Medhat; Kartushinsky, Alexander; Mul'gi, A. S.; Rudi, Ulo; Tisler, S.

doi:10.1016/0301-9322(95)00040-5

Cited by 13 publications

(3 citation statements)

References 3 publications

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“…On subsequent iterations one calculates only residual matrix solving the two tridiagonal systems. The rate of convergence 3 10 − and the number of steps for total convergence mainly depend on flow domain size and in the considered case it was up to 15,000 steps. For the computations presented in this paper, 600,000 uniformly sized volumes were used.…”

Section: Resultsmentioning

confidence: 99%

“…This implies that the diffusive source terms were retained only in one direction, namely in the transverse one, and the magnitude of the average transverse velocity components of the gas-and dispersed phases was much less than that of the longitudinal components of the corresponding velocities of gaseous and dispersed phases. Such approach is thoroughly valid and used in the case of pipe channel flows as well as in the turbulent round jets [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of Uprising Turbulent Flow by 2d Rans for Fluidized-Bed Conditions

Krupenski¹,

Kartushinsky²,

Siirde³

et al. 2010

Oil Shale

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Uprising Turbulent Flow by 2d Rans for Fluidized-Bed Conditions

Krupenski¹,

Kartushinsky²,

Siirde³

et al. 2010

Oil Shale

View full text Add to dashboard Cite

“…This implies that the diffusive source terms were retained in one direction only, namely in transverse one, and magnitudes of the average transverse velocity components of the gas-and dispersed phases were much less than those of the longitudinal components of the corresponding velocities of both phases. Such approach is thoroughly valid and used in the case of pipe channel flows as well as in the turbulent round jets together with the flow past of the rigid shapes [3,9,10].…”

Section: The Turbulent Boundary Layer Modelmentioning

confidence: 99%

Numerical Simulation of Uprising Gas-Solid Particle Flow in Circulating Fluidised Bed

Kartushinsky

Martins²,

Rudi³

et al. 2009

Oil Shale

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Concentration of solid particles of ash and inert material present in the combustion chamber of a circulating fluidised-bed boiler is very high, giving rise to some disadvantages. At the same time, the required temperature level in the combustion chamber is guaranteed by circulation of solid particles. In this work numerical simulation of gas-solid particle flow has been performed in the frame of a two-fluid model, namely the Eulerian approach for the dispersed phase, for conditions of the circulating fluidised bed, ranging from moderate to high mass ratios of the flow. An incorporated original model of closure of transport equations of the dispersed phase permitted to account the interparticle collisions which might be indispensable to proper numerical simulation of the process in the circulating fluidised bed under discussion. The results of this work would help to improve the processes occurring in the combustion chamber of the circulating fluidised-bed boiler.

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Particles deposition at horizontal flat plate in turbulent particulate flow

et al. 2013

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The deposition of aluminium oxide 12 and 23 μm particles onto a horizontal flat plate within the laminar boundary layer in the free‐stream moderate turbulent flow was studied. The present numerical model considered the deposition onto the surface to be a probabilistic process determined both by hydrodynamics and the adhesive behaviour of particles and surface. Numerical simulation was realised for the flat‐plate laminar boundary layer. The two‐fluid approach was used for writing the Euler equations for a carrier gas and particulate phase. The effects of gravity and lift forces on the particles velocities and mass concentration, occurring within the boundary layer, and deposition were studied separately for various particle sizes. It was revealed that gravity and lift forces have decisive influence on the behaviour of solid particles taken place within the laminar boundary layer and on their deposition that is expressed via the distributions of the particles transverse velocity and mass concentration. These effects become more pronounced for the larger 23 μm particles. This fact, coupled with the higher probability of entrainment by the surface, results in their larger deposition velocity. The given study is the attempt to combine the hydrodynamic and adhesive aspects of the particles deposition for its more accurate estimate that is suitable for various practical devices.

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Experimental and theoretical study of the distribution of mass concentration of solid particles in the two-phase laminar boundary layer on a flat plate

Cited by 13 publications

References 3 publications

Numerical Simulation of Uprising Turbulent Flow by 2d Rans for Fluidized-Bed Conditions

Numerical Simulation of Uprising Turbulent Flow by 2d Rans for Fluidized-Bed Conditions

Numerical Simulation of Uprising Gas-Solid Particle Flow in Circulating Fluidised Bed

Particles deposition at horizontal flat plate in turbulent particulate flow

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