Effects of wall vibration on particle deposition and reentrainment in aerosol flow

Abstract The simultaneous phenomenon of particle deposition and reentrainment on a vibrating wall has been studied experimentally. Aerosols that were generated by dispersing alumina powder, of size 3.8-12.5 Mm mass median diameter, were transported into a vertical glass tube equipped with a vibration motor. The formation process of the particle deposition layer in the tube was observed through a digital video camera with a zoom lens. The experimental results showed that wall vibration was effective to enhance particle reentrainment. Critical flow velocity for the case of no particle layer formation decreased with increasing vibration acceleration and/or particle diameter. In contrast, at a velocity below the critical value, the wall vibration increased the amount of particles deposited on the wall. The critical condition for no particle layer formation under wall vibration was explained using a moment balance model.

[1]  M. Fichman,et al.  A MODEL FOR TURBULENT DEPOSITION OF AEROSOLS , 1988 .

[2]  Shuji Matsusaka,et al.  Particle reentrainment from a fine powder layer in a turbulent air flow , 1996 .

[3]  B. Yates,et al.  Mechanism of detachment of colloidal particles from a flat substrate in a turbulent flow , 1973 .

[4]  S. Matsusaka,et al.  Numerical Simulation of Particle Trajectory in Relation to the Formation of a Striped Pattern Deposition Layer , 2001 .

[5]  A. B. Hedley,et al.  particle deposition behaviour from turbulent flows , 1984 .

[6]  M. Reeks,et al.  Deposition and Resuspension of Gas-Borne Particles in Recirculating Turbulent Flows , 1988 .

[7]  G. Kasper,et al.  On the kinetics of particle reentrainment from surfaces , 1989 .

[8]  S. Matsusaka,et al.  Deposition layers formed by a turbulent aerosol flow of micron and sub-micron particles , 2001 .

[9]  S. Matsusaka,et al.  Formation of Wall Particle Layers by Simultaneous Deposition and Reentrainment of Fine Particles in Turbulent Aerosol Flows. , 1993 .

[10]  Kikuo Okuyama,et al.  RE-ENTRAINMENT OF SMALL AGGREGATE PARTICLES FROM A PLANE SURFACE BY AIR STREAM , 1980 .

[11]  Goodarz Ahmadi,et al.  Deposition of aerosols on surfaces in a turbulent channel flow , 1993 .

[12]  Shuji Matsusaka,et al.  Simultaneous phenomenon of particle deposition and reentrainment in charged aerosol flow — effects of particle charge and external electric field on the deposition layer , 1999 .

[13]  John S. Young,et al.  A theory of particle deposition in turbulent pipe flow , 1997, Journal of Fluid Mechanics.

[14]  Andrew G. Glen,et al.  APPL , 2001 .

[15]  Gennady Ziskind,et al.  Resuspension of particulates from surfaces to turbulent flows : review and analysis , 1995 .

[16]  Hiroshi Tanaka,et al.  Simultaneous Phenomenon of Particle Deposition and Reentrainment: Effects of Surface Roughness on Deposition Layer of Striped Pattern , 2000 .

[17]  S. Matsusaka,et al.  Formation of striped pattern deposition layers by an aerosol flow — analysis of thickness and interval of layers , 1998 .

[18]  Hwa-Chi Wang,et al.  Effects of Inceptive motion on particle detachment from surfaces , 1990 .

[19]  Gennady Ziskind,et al.  Adhesion moment model for estimating particle detachment from a surface , 1997 .

[20]  M. Reeks,et al.  On the resuspension of small particles by a turbulent flow , 1988 .

[21]  Benjamin Y. H. Liu,et al.  Particle detachment from disk surfaces of computer disk drives , 1991 .

[22]  S. Matsusaka,et al.  The Effect of Particle Size on the Movement of a Striped Pattern Deposition Layer in an Aerosol Flow , 1997 .

[23]  B. Yates,et al.  A sub layer model for the deposition of particles from a turbulent flow , 1975 .

[24]  S. Friedlander,et al.  Deposition of Suspended Particles from Turbulent Gas Streams , 1957 .

[25]  Shuji Matsusaka,et al.  Micro-feeding of fine powders using a capillary tube with ultrasonic vibration , 1995 .

[26]  J. W. Cleaver,et al.  The effect of re-entrainment on particle deposition , 1976 .

[27]  S. Matsusaka,et al.  Mechanism of Formation of Particle Deposition Layers by an Aerosol Flow. , 1996 .