Influence of turbulence closure on the simulation of flow and dispersion in complex terrain

Stefano Alessandrini; Enrico Ferrero; Silvia Trini Castelli; Domenico Anfossi

doi:10.1504/IJEP.2005.007391

Influence of turbulence closure on the simulation of flow and dispersion in complex terrain

Stefano Alessandrini
, Enrico Ferrero
, Silvia Trini Castelli
, Domenico Anfossi

University of Eastern Piedmont
Institute for the Sciences of Atmosphere and Climate of the National Research Council (CNR)
National Research Council of Italy
Istituto di Scienze dell'Atmosfera e del Clima - Sezione di Torino

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

A dispersion simulation test for the RAMS-MIRS-SPRAY (RMS) modelling system in real complex terrain is presented. As a test case the TRACT campaign was chosen because this data set allows the comparison of both the meteorological variables and the tracer concentrations. Particular attention was focused on testing alternative turbulence closures and assessing their influence on modelling both the meteorology and the dispersion. Firstly, the different turbulence closures introduced in the meteorological model are compared. Secondly, the dispersion simulations are performed using the turbulence provided by the different models. It is demonstrated that using different closure models for turbulence modifies also the mean flow. Concerning the tracer dispersion, the new closures utilising a fully 3D equation for the turbulent kinetic energy seem to give promising results.

Original language	English
Pages (from-to)	154-170
Number of pages	17
Journal	International Journal of Environment and Pollution
Volume	24
Issue number	1-4
DOIs	https://doi.org/10.1504/IJEP.2005.007391
State	Published - 2005

Keywords

Atmospheric dispersion
Experimental campaign
Meteorology and air pollution modelling
Turbulence closures

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10.1504/IJEP.2005.007391

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title = "Influence of turbulence closure on the simulation of flow and dispersion in complex terrain",

abstract = "A dispersion simulation test for the RAMS-MIRS-SPRAY (RMS) modelling system in real complex terrain is presented. As a test case the TRACT campaign was chosen because this data set allows the comparison of both the meteorological variables and the tracer concentrations. Particular attention was focused on testing alternative turbulence closures and assessing their influence on modelling both the meteorology and the dispersion. Firstly, the different turbulence closures introduced in the meteorological model are compared. Secondly, the dispersion simulations are performed using the turbulence provided by the different models. It is demonstrated that using different closure models for turbulence modifies also the mean flow. Concerning the tracer dispersion, the new closures utilising a fully 3D equation for the turbulent kinetic energy seem to give promising results.",

keywords = "Atmospheric dispersion, Experimental campaign, Meteorology and air pollution modelling, Turbulence closures",

author = "Stefano Alessandrini and Enrico Ferrero and Castelli, \{Silvia Trini\} and Domenico Anfossi",

year = "2005",

doi = "10.1504/IJEP.2005.007391",

language = "English",

volume = "24",

pages = "154--170",

journal = "International Journal of Environment and Pollution",

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T1 - Influence of turbulence closure on the simulation of flow and dispersion in complex terrain

AU - Alessandrini, Stefano

AU - Ferrero, Enrico

AU - Castelli, Silvia Trini

AU - Anfossi, Domenico

PY - 2005

Y1 - 2005

N2 - A dispersion simulation test for the RAMS-MIRS-SPRAY (RMS) modelling system in real complex terrain is presented. As a test case the TRACT campaign was chosen because this data set allows the comparison of both the meteorological variables and the tracer concentrations. Particular attention was focused on testing alternative turbulence closures and assessing their influence on modelling both the meteorology and the dispersion. Firstly, the different turbulence closures introduced in the meteorological model are compared. Secondly, the dispersion simulations are performed using the turbulence provided by the different models. It is demonstrated that using different closure models for turbulence modifies also the mean flow. Concerning the tracer dispersion, the new closures utilising a fully 3D equation for the turbulent kinetic energy seem to give promising results.

AB - A dispersion simulation test for the RAMS-MIRS-SPRAY (RMS) modelling system in real complex terrain is presented. As a test case the TRACT campaign was chosen because this data set allows the comparison of both the meteorological variables and the tracer concentrations. Particular attention was focused on testing alternative turbulence closures and assessing their influence on modelling both the meteorology and the dispersion. Firstly, the different turbulence closures introduced in the meteorological model are compared. Secondly, the dispersion simulations are performed using the turbulence provided by the different models. It is demonstrated that using different closure models for turbulence modifies also the mean flow. Concerning the tracer dispersion, the new closures utilising a fully 3D equation for the turbulent kinetic energy seem to give promising results.

KW - Atmospheric dispersion

KW - Experimental campaign

KW - Meteorology and air pollution modelling

KW - Turbulence closures

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DO - 10.1504/IJEP.2005.007391

M3 - Article

AN - SCOPUS:23844552179

SN - 0957-4352

VL - 24

SP - 154

EP - 170

JO - International Journal of Environment and Pollution

JF - International Journal of Environment and Pollution

IS - 1-4

ER -

Influence of turbulence closure on the simulation of flow and dispersion in complex terrain

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Keywords

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