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Deposition of solid particles in laminar boundary layer on a flat plate

  • Heat and Mass Transfer and Physical Gasdynamics
  • Published:
High Temperature Aims and scope

Abstract

Results are given of experimental and theoretical investigation of deposition of small solid particles on the surface of a flat plate under conditions of vertical laminar boundary layer. The present investigation is aimed at qualitatively and quantitatively estimating the effect made by the parameters of two-phase flow of the “gas—solid particles” type and by the adhesive properties of particles and surface on the deposition of particles on the plate surface. The flow velocity is 1.5 and 3 m/s. In so doing, the value of Reynolds number along the plate does not exceed 105. Synthetic corundum powders with average sizes of 12, 23, and 32 µm are used as the dispersed phase of two-phase flow. The mass concentration of particles in the flow is 0.01 kg/m3. A flat plate of stainless steel is used as the object of investigation. The distributions of gas velocity and concentration of particles within the boundary layer are measured using laser optical diagnostics. The number of particles deposited along the plate surface is measured by the gravimetric method. The adhesive properties of the “particle-surface” pair are studied using the centrifugal method of detachment of particles from the surface. Logarithmic-normal dependences of the number of adhesion of particles on the force of detachment are obtained. The hydrodynamic parameters of two-phase flow in the vicinity of the plate surface are calculated using the model of two-phase laminar boundary layer.

The mathematical expression is suggested for the calculation of the magnitude of deposition of solid particles along the surface of a flat plate, which includes the special features of hydrodynamics of flow, the adhesive properties of the particles and surface, and the probabilistic pattern of the process of entrapment of particles by the surface.

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Authors and Affiliations

  1. Tallinn University of Technology, Tallinn, Estonia

    A. I. Kartushinsky, I. A. Krupensky, S. V. Tisler, M. T. Hussainov & I. N. Shcheglov

Authors
  1. A. I. Kartushinsky
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  2. I. A. Krupensky
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  3. S. V. Tisler
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  4. M. T. Hussainov
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  5. I. N. Shcheglov
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Corresponding author

Correspondence to S. V. Tisler.

Additional information

Original Russian Text © A.I. Kartushinsky, I.A. Krupensky, S.V. Tisler, M.T. Hussainov, I.N. Shcheglov, 2009, published in Teplofizika Vysokikh Temperatur, 2009, Vol. 47, No. 6, pp. 927–936.

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Kartushinsky, A.I., Krupensky, I.A., Tisler, S.V. et al. Deposition of solid particles in laminar boundary layer on a flat plate. High Temp 47, 892–901 (2009). https://doi.org/10.1134/S0018151X09060170

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  • DOI: https://doi.org/10.1134/S0018151X09060170

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