Modelling extreme concentration from a source in a turbulent flow over rough wall
Modelling extreme concentration from a source in a turbulent flow over rough wall
The concentration fluctuations in passive plumes from an elevated and a groundlevel
source in a turbulent boundary layer over a rough wall were studied using
large eddy simulation and wind tunnel experiment. The predictions of statistics
up to second order moments were thereby validated. In addition, the trend of relative
fluctuations far downstream for a ground level source was estimated using
dimensional analysis. The techniques of extreme value theory were then applied
to predict extreme concentrations by modelling the upper tail of the probability
density function of the concentration time series by the Generalised Pareto Distribution.
Data obtained from both the simulations and experiments were analysed in
this manner. The predicted maximum concentration (?0) normalized by the local
mean concentration (Cm) or by the local r.m.s of concentration fluctuation (crms),
was extensively investigated. Values for ?0/Cm and ?0/crms as large as 50 and 20
respectively were found for the elevated source and 10 and 15 respectively for the
ground-level source.
large-eddy simulation, atmospheric dispersion, extreme value theory
3395-3406
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Hayden, Paul
b5662acc-6375-4f86-afee-04c779155d5f
Robins, Alan G.
18109ce3-7531-40dc-a3a2-c2d87ba58dc7
Voke, Peter R.
ba3c5406-72c6-4377-816d-8bf2c427ba95
2007
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Hayden, Paul
b5662acc-6375-4f86-afee-04c779155d5f
Robins, Alan G.
18109ce3-7531-40dc-a3a2-c2d87ba58dc7
Voke, Peter R.
ba3c5406-72c6-4377-816d-8bf2c427ba95
Xie, Zheng-Tong, Hayden, Paul, Robins, Alan G. and Voke, Peter R.
(2007)
Modelling extreme concentration from a source in a turbulent flow over rough wall.
Atmospheric Environment, 41 (16), .
(doi:10.1016/j.atmosenv.2006.12.022).
Abstract
The concentration fluctuations in passive plumes from an elevated and a groundlevel
source in a turbulent boundary layer over a rough wall were studied using
large eddy simulation and wind tunnel experiment. The predictions of statistics
up to second order moments were thereby validated. In addition, the trend of relative
fluctuations far downstream for a ground level source was estimated using
dimensional analysis. The techniques of extreme value theory were then applied
to predict extreme concentrations by modelling the upper tail of the probability
density function of the concentration time series by the Generalised Pareto Distribution.
Data obtained from both the simulations and experiments were analysed in
this manner. The predicted maximum concentration (?0) normalized by the local
mean concentration (Cm) or by the local r.m.s of concentration fluctuation (crms),
was extensively investigated. Values for ?0/Cm and ?0/crms as large as 50 and 20
respectively were found for the elevated source and 10 and 15 respectively for the
ground-level source.
Text
modelling_extreme_concentrations_from_a_source_in_a_turbulent_flow_over_a_rough_wall.pdf
- Accepted Manuscript
More information
Published date: 2007
Keywords:
large-eddy simulation, atmospheric dispersion, extreme value theory
Organisations:
Aerodynamics & Flight Mechanics
Identifiers
Local EPrints ID: 45848
URI: http://eprints.soton.ac.uk/id/eprint/45848
ISSN: 1352-2310
PURE UUID: 97518b36-01bd-402c-9345-62ad216c226a
Catalogue record
Date deposited: 16 Apr 2007
Last modified: 16 Mar 2024 03:40
Export record
Altmetrics
Contributors
Author:
Paul Hayden
Author:
Alan G. Robins
Author:
Peter R. Voke
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
