## Pollutant dispersion over a triangular ridge: A numerical study

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Pollutant dispersion over a triangular ridge: A numerical study
(EN)

Bergeles, G
(EN)

Mouzakis, FN
(EN)

N/A
(EN)

Predictions are presented of the inert pollutant dispersion from a continuous point source over a two-dimensional ridge with triangular cross-section; the two-dimensional flow field is obtained after numerical solution of the time-average Reynolds equations, and the three-dimensional concentration field from the transport equation of the material; the equations are written on an orthogonal curvilinear coordinate system and transformed into finite difference form after discretization in physical space; turbulence is simulated by the two-equation κ-ε model of the turbulence. In the first part of the paper, the numerical method is discussed and in the second part the results are presented and compared with available laboratory data. The results are of engineering importance and clarify the transport mechanisms of pollutant as the pollutant trajectory is greatly affected by the position of the pollution source relative to the surface obstruction.Predictions are presented of the inert pollutant dispersion from a continuous point source over a two-dimensional ridge with triangular cross-section; the two-dimensional flow field is obtained after numerical solution of the time-averaged Reynolds equations, and the three-dimensional concentration field from the transport equation of the material; the equations are written on an orthogonal curvilinear coordinate system and transformed into finite difference form after discretization in physical space; turbulence is simulated by the two-equation k-ε model for the turbulence. In the first part of the paper, the numerical method is discussed and in the second part the results are presented and compared with available laboratory data. The results are of engineering importance and clarify the transport mechanisms of pollutant as the pollutant trajectory is greatly affected by the position of the pollution source relative to the surface obstruction.
(EN)

journalArticle

diffusion
(EN)

point source
(EN)

MATERIAL DISPERSION
(EN)

pollutant dispersion
(EN)

turbulent flow
(EN)

numerical study
(EN)

Air Pollution
(EN)

Flow of Fluids - Diffusion
(EN)

Complex Terrain
(EN)

article
(EN)

turbulence model
(EN)

Pollutant Dispersion
(EN)

Turbulent Diffusion
(EN)

Turbulence Models
(EN)

Aerodynamics - Turbulent
(EN)

Mathematical Techniques - Finite Difference Method
(EN)

atmospheric dispersion
(EN)

DIFFUSION FROM POINT SOURCE
(EN)

TURBULENCE MODEL
(EN)

ORTHOGONAL CURVILINEAR COORDINATE SYSTEM
(EN)

FINITE DIFFERENCING
(EN)

model
(EN)

Dispersion Modelling
(EN)

triangular ridge
(EN)

Εθνικό Μετσόβιο Πολυτεχνείο
(EL)

National Technical University of Athens
(EN)

Atmospheric Environment - Part A General Topics
(EN)

1991

PERGAMON-ELSEVIER SCIENCE LTD
(EN)

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