Experimental investigation of dust particle deposition in a turbulent channel flow

1993 ◽  
Vol 24 (6) ◽  
pp. 795-815 ◽  
Author(s):  
William Kvasnak ◽  
Goodarz Ahmadi ◽  
Raymond Bayer ◽  
Michael Gaynes
Keyword(s):  
Experimental Investigation ◽  
Dust Particle ◽  
Channel Flow ◽  
Particle Deposition ◽  
Turbulent Channel Flow

Deposition of Small Particles From Turbulent Flows

2003 ◽  
Author(s):  
Z. Wu ◽  
J. B. Young
Keyword(s):  
Turbulent Flow ◽  
Turbulent Flows ◽  
Channel Flow ◽  
Gas Turbines ◽  
Particle Deposition ◽  
Numerical Study ◽  
Turbulent Channel Flow ◽  
Brownian Diffusion ◽  
Small Particles ◽  
Two Fluid

This paper deals with particle deposition onto solid walls from turbulent flows. The aim of the study is to model particle deposition in industrial flows, such as the one in gas turbines. The numerical study has been carried out with a two fluid approach. The possible contribution to the deposition from Brownian diffusion, turbulent diffusion and shear-induced lift force are considered in the study. Three types of turbulent two-phase flows have been studied: turbulent channel flow, turbulent flow in a bent duct and turbulent flow in a turbine blade cascade. In the turbulent channel flow case, the numerical results from a two-dimensional code show good agreement with numerical and experimental results from other resources. Deposition problem in a bent duct flow is introduced to study the effect of curvature. Finally, the deposition of small particles on a cascade of turbine blades is simulated. The results show that the current two fluid models are capable of predicting particle deposition rates in complex industrial flows.

Brownian particle deposition in a directly simulated turbulent channel flow

1993 ◽  
Vol 5 (6) ◽  
pp. 1427-1432 ◽  
Author(s):  
Hadj Ounis ◽  
Goodarz Ahmadi ◽  
John B. McLaughlin
Keyword(s):  
Channel Flow ◽  
Particle Deposition ◽  
Brownian Particle ◽  
Turbulent Channel Flow

Large Eddy Simulation of Particle Deposition in a Turbulent Channel Flow

2008 ◽  
Author(s):  
Mohammad Rahnama ◽  
Mazyar Salmanzadeh ◽  
Goodarz Ahmadi
Keyword(s):  
Channel Flow ◽  
Deposition Rate ◽  
Particle Deposition ◽  
Fluid Velocity ◽  
Turbulent Channel Flow ◽  
Continuous Phase ◽  
Reynolds Stresses ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Subgrid Scales

Particle transport and deposition in a turbulent channel flow simulated by the Large Eddy simulations (LES) were studied. Particular attention was paid to the effect of subgrid scales (SGS) turbulence fluctuation on particle motion. Finite volume method was used for finding instantaneous filtered fluid velocity fields of LES of the continuous phase in the channel. Selective structure function model was used to account for the subgrid-scale Reynolds stresses. It was shown that the LES was capable of capturing the turbulence near wall coherent eddy structures. Particle motions were investigated using a Lagrangian particle tracking approach with inclusion of the Stokes drag, lift, Brownian and gravity forces. Effects of SGS of turbulence fluctuations on deposition rate of different size particles were studied. It was shown that the inclusion of the SGS turbulence fluctuations improves the model predictions for particle deposition rate especially for small particles.

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