Connectivity of concentration clouds in turbulent flows
Connectivity of concentration clouds in turbulent flows
We study two cases of dispersion of neutral scalar species from point sources into a simulated boundary layer. Using
large-eddy simulation, we calculate the concentration fluctuations of passive plumes from an elevated (ES) and a
ground-level (GLS) source in a turbulent boundary layer over a rough wall. The mean concentration, relative
fluctuations and spectra are found in good agreement with the wind-tunnel measurements. Concentration clouds have
been analyzed by applying a multi-cloud tracking and conditional sampling algorithm to LES data. The space-time
development of the concentration clouds are examined. In particular, we focus our main interest on the quantification
of the connectivity of the concentration clouds, which is a very tough issue because of the immense dataset.
Keywords: concentration cloud, quantification of connectivity, multi-cloud tracking, conditional sampling
Tsinghua University Press & Springer-Verlag
Xie, Z.-T.
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Voke, P.R.
9c214db2-7fba-4871-b2ca-23b9f25e3b20
2004
Xie, Z.-T.
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Voke, P.R.
9c214db2-7fba-4871-b2ca-23b9f25e3b20
Xie, Z.-T. and Voke, P.R.
(2004)
Connectivity of concentration clouds in turbulent flows.
In Recent Advances in Fluid Mechanics - Proceedings of the Fourth International Conference on Fluid Mechanics.
Tsinghua University Press & Springer-Verlag..
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Conference or Workshop Item
(Paper)
Abstract
We study two cases of dispersion of neutral scalar species from point sources into a simulated boundary layer. Using
large-eddy simulation, we calculate the concentration fluctuations of passive plumes from an elevated (ES) and a
ground-level (GLS) source in a turbulent boundary layer over a rough wall. The mean concentration, relative
fluctuations and spectra are found in good agreement with the wind-tunnel measurements. Concentration clouds have
been analyzed by applying a multi-cloud tracking and conditional sampling algorithm to LES data. The space-time
development of the concentration clouds are examined. In particular, we focus our main interest on the quantification
of the connectivity of the concentration clouds, which is a very tough issue because of the immense dataset.
Keywords: concentration cloud, quantification of connectivity, multi-cloud tracking, conditional sampling
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Published date: 2004
Venue - Dates:
conference; 2004-07-20; 2004-07-23, Dalian, China, 2004-07-19 - 2004-07-22
Identifiers
Local EPrints ID: 71887
URI: http://eprints.soton.ac.uk/id/eprint/71887
PURE UUID: a87509ec-118d-483e-acec-7b237eb5e741
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Date deposited: 12 Jan 2010
Last modified: 11 Dec 2021 04:00
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Author:
P.R. Voke
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