Numerical investigation of concentrations and concentration fluctuations around isolated obstacles of different shapes. Comparison with wind tunnel results

Mavroidis, Ilias; Andronopoulos, S.; Venetsanos, A.G.; Bartzis, John G.

doi:10.1007/s10652-015-9394-3

Cited by 13 publications

(2 citation statements)

References 41 publications

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“…Brethouwer et al 1999, [12]), Large Eddy Simulations (LES) (e.g. Watanabe [46]), reactive plume models (Galmarini et al, 1995, [33]), fluctuating and meandering plume models (e.g., Franzese, 2003, [30]; Ferrero et al, 2013, [27]; Gifford, 1959, [35]; Luhar et al, 2000, [43]; Yee & Wilson, 2000, [68]) and stochastic models for odour impact (Lo Iacono, 2009, [42]).…”

Section: ' 'mentioning

confidence: 99%

A stochastic Lagrangian micromixing model for the dispersion of reactive scalars in turbulent flows: role of concentration fluctuations and improvements to the conserved scalar theory under non-homogeneous conditions

et al. 2017

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Section: ' 'mentioning

confidence: 99%

A stochastic Lagrangian micromixing model for the dispersion of reactive scalars in turbulent flows: role of concentration fluctuations and improvements to the conserved scalar theory under non-homogeneous conditions

et al. 2017

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“…The use of a transport equation for the concentration variance was first adopted in [26]. Of particular interest for the present paper is the calculation of concentration fluctuations in dispersion in urban environments or in the vicinity of buildings [27][28][29][30][31][32][33][34][35][36][37][38][39]. Several experimental studies of concentration fluctuations of plume (continuous release) dispersion in urban areas or in the vicinity of buildings in real scale or in the wind tunnel have also been reported in the literature [40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Modelling Exposure from Airborne Hazardous Short-Duration Releases in Urban Environments

2021

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When considering accidental or/and deliberate releases of airborne hazardous substances the release duration is often short and in most cases not precisely known. The downstream exposure in those cases is stochastic due to ambient turbulence and strongly dependent on the release duration. Depending on the adopted modelling approach, a relatively large number of dispersion simulations may be required to assess exposure and its statistical behaviour. The present study introduces a novel approach aiming to replace the large number of the abovementioned simulation scenarios by only one simulation of a corresponding continuous release scenario and to derive the exposure-related quantities for each finite-duration release scenario by simple relationships. The present analysis was concentrated on dosages and peak concentrations as the primary parameters of concern for human health. The experimental and theoretical analysis supports the hypothesis that the dosage statistics for short releases can be correlated with the corresponding continuous release concentration statistics. The analysis shows also that the peak concentration statistics for short-duration releases in terms of ensemble average and standard deviation are well correlated with the corresponding dosage statistics. However, for more reliable quantification of the associated correlation coefficients further experimental and theoretical research is needed. The probability/cumulative density function for dosage and peak concentration can be approximated by the beta function proposed in an earlier work by the authors for continuous releases.

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Assessment of Puff-Dispersion Variability Through Lagrangian and Eulerian Modelling Based on the JU2003 Campaign

Andronopoulos

Bartzis

Efthimiou

et al. 2018

Boundary-Layer Meteorol

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Numerical investigation of concentrations and concentration fluctuations around isolated obstacles of different shapes. Comparison with wind tunnel results

Cited by 13 publications

References 41 publications

A stochastic Lagrangian micromixing model for the dispersion of reactive scalars in turbulent flows: role of concentration fluctuations and improvements to the conserved scalar theory under non-homogeneous conditions

A stochastic Lagrangian micromixing model for the dispersion of reactive scalars in turbulent flows: role of concentration fluctuations and improvements to the conserved scalar theory under non-homogeneous conditions

Modelling Exposure from Airborne Hazardous Short-Duration Releases in Urban Environments

Assessment of Puff-Dispersion Variability Through Lagrangian and Eulerian Modelling Based on the JU2003 Campaign

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