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Three-Dimensional Lagrangian Simulation of Suspended Particles in the Neutrally Stratified Atmospheric Surface Layer

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Abstract

A three-dimensional (3-D) inertial particle – Lagrangian stochastic model for heavy particles in turbulent flows has been constructed. In this model, particle velocities are computed by adopting a non-linear drag law, while fluid velocity in the vicinity of a particle is calculated using a 3-D Langevin equation. Our model results have shown that the inclusion of the horizontal fluid velocity fluctuation computations and a non-linear drag law have an impact on the statistics of both fluid and particles when compared with our earlier one-dimensional (1-D) model with a linear drag law. Model results are compared and contrasted with Businger’s 1965 theory in terms of effective settling velocity.

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Authors and Affiliations

  1. Department of Earth and Atmospheric Science, York University, 4700 Keele Street, Toronto, Ont., M3J 1P3, Canada

    P. Y. Li & P. A. Taylor

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  1. P. Y. Li
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  2. P. A. Taylor
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Correspondence to P. Y. Li.

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Li, P.Y., Taylor, P.A. Three-Dimensional Lagrangian Simulation of Suspended Particles in the Neutrally Stratified Atmospheric Surface Layer. Boundary-Layer Meteorol 116, 301–311 (2005). https://doi.org/10.1007/s10546-004-2731-6

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  • DOI: https://doi.org/10.1007/s10546-004-2731-6

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