publication . Article . Preprint . 2010

Joint PDF Modelling of Turbulent Flow and Dispersion in an Urban Street Canyon

Jozsef Bakosi; Pasquale Franzese; Zafer Boybeyi;
Open Access
  • Published: 23 Mar 2010 Journal: Boundary-Layer Meteorology, volume 131, pages 245-261 (issn: 0006-8314, eissn: 1573-1472, Copyright policy)
  • Publisher: Springer Science and Business Media LLC
Abstract
The joint probability density function (PDF) of turbulent velocity and concentration of a passive scalar in an urban street canyon is computed using a newly developed particle-in-cell Monte Carlo method. Compared to moment closures, the PDF methodology provides the full one-point one-time PDF of the underlying fields containing all higher moments and correlations. The small-scale mixing of the scalar released from a concentrated source at the street level is modelled by the interaction by exchange with the conditional mean (IECM) model, with a micro-mixing time scale designed for geometrically complex settings. The boundary layer along no-slip walls (building si...
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Subjects
free text keywords: Atmospheric Science, Physics - Geophysics, Physics - Computational Physics, Physics - Fluid Dynamics, 85A10, 76F25, 76F55, 76M35, 37N10, Boundary layer, Computer simulation, Probability density function, Mechanics, Geology, Turbulence, Monte Carlo method, Scalar (physics), Reynolds stress, Large eddy simulation, Meteorology
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