Application of the modeling probability distribution functions for Lagrangian simulation of a passive tracer in the atmospheric boundary layer
| Autor: | I. V. Mitin, B. B. Ilyushin, D. Ph. Sikovsky |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Convection
Physics Environmental Engineering 010504 meteorology & atmospheric sciences Turbulence Planetary boundary layer Energy Engineering and Power Technology Probability density function Mechanics Condensed Matter Physics Random walk 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake Modeling and Simulation TRACER 0103 physical sciences symbols Probability distribution Statistical physics Lagrangian 0105 earth and related environmental sciences |
| Zdroj: | Journal of Engineering Thermophysics. 25:495-503 |
| ISSN: | 1990-5432 1810-2328 |
| DOI: | 10.1134/s1810232816040068 |
| Popis: | The numerical stochastic Lagrangian modeling of the passive tracer in a convective atmospheric boundary layer (CABL) was performed based on the random walk and Langevinmodels of turbulent dispersion. The statistical structure of turbulence is modeled by the probability density function (PDF) of vertical velocity fluctuations, which is recovered by the calculated statistical moments of the vertical velocity fluctuations. Four models of the PDF reconstruction were tested and the results of simulations are compared with the experimental data in CABL. The superiority of Langevin model over the random-walk models is demonstrated. |
| Databáze: | OpenAIRE |
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