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Thermophysics and Aeromechanics

2011 year, number 2

Deposition of inertial particles from turbulent flow in channels at high Reynolds numbers

D.PH. Sikovsky
Kutateladze Institute of Thermophysics SB RAS; Novosibirsk State University
Keywords: turbulence, particle-laden flows, particle deposition, asymptotic theory
Pages: 235-254


On the basis of the previously developed asymptotic theory of turbulent particle-laden flow with particle deposition in channels coupled with the transport model for the particle Reynolds stress, an asymptotic solution to the problem on the deposition of particles in the limit of high Reynolds numbers was obtained. The numerical calculations confirmed the presence, in the region of the transition from the diffusion-impaction regime of particle sedimentation to the inertia-moderated regime, bifurcation phenomenon of a solution found previously in earlier studies. Features of particle accumulation in the viscous sublayer are analyzed. On the basis of the numerical solution, correlations for particle deposition velocity were obtained. Boundary conditions of the wall-function type for particle concentration whose use allows widening the applicability limits of the equilibrium Eulerian models in terms of particle inertia are proposed.