Effect of Stokes Number on Particle Dispersion

Xiao, Yang; Uthuppan, J.

doi:10.1615/atomizspr.v4.i2.60

Cited by 11 publications

(1 citation statement)

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“…The velocity of the fluid at each particle position was calculated directly from the triple sums Squires and Eaton (1991) and by Wang and Stock (1993), among others, have used this approach to characterize particle dispersion in homogeneous turbulence. This approach was also applied to different nonhomogeneous turbulent flows, for instance in mixing layers, by Chein and Chung (19881, Crowe et al (1988), and Aggarwal et al (1994), and by Ounis et al (1991) for turbulent channel flows, to quantify the dispersion of Brownian particles; by Kontomaris and Hanratty (1994), to investigate the effect of molecular diffusivity on the diffusion of a scalar property; and by Papavassiliou and Hanratty (1995), to describe the turbulent transport of heat from a wall. In general, Eq.…”

Section: Turbulent Diffusion Theory Of Dispersion In Homogeneous Turbmentioning

confidence: 99%

Lagrangian simulation of turbulent particle dispersion in electrostatic precipitators

et al. 1997

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Industrial design of electrostatic precipitators is based on the transport theory developed by Deutsch (1922), which assumes that transverse turbulent mixing is effective enough to maintain the concentration profile uniform throughout the cross section (i-e., turbulent dimivity is assumed infinite). To improve understanding of turbulent particle dispersion under the influence of electrostatic forces, a database on particle trajectories was first generated, based on the flow field from a direct numerical simulation of a plate-plate precipitator (Soldati et al., 1993). The efect of various parameters, such as particle size, charge and particle migration velocity, on dispersion and collection efficiency was investigated. Results show that particle concentration profiles are not uniform due to finite values of "turbulent difision "coefficient. The simulations indicate that the early stages of particle collection are controlled by particle migration velocity, while final stages are controlled by turbulence dimion mechanisms.

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