Three-Dimensional Lagrangian Simulation of Suspended Particles in the Neutrally Stratified Atmospheric Surface Layer |
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Authors: | P Y Li P A Taylor |
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Institution: | (1) Department of Earth and Atmospheric Science, York University, 4700 Keele Street, Toronto, Ont., M3J 1P3, Canada |
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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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Keywords: | Lagrangian simulation Neutrally stratified Stochastic model Surface boundary-layer Suspended particles |
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