H15-117

Application of detached eddy simulation to neighborhood scale atmospheric dispersion

Konstantinos Kakosimos, Marc J. Assael

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Present work addresses the current important problem of modelling the dispersion of toxic gases (i.e. the wind field prognosis) released in the urban terrain or neighbourhood scale by a new for the area approach, the Detached Eddy Simulation. In this scale, both Fast Approximate (FAMs) and Fully Computational Models (FCMs) have been tested, while none of these models' categories can prevail over the other. Nevertheless, the FCMs are continuously becoming more user-friendly and approachable to the communities of researchers and decision-makers even though their use demands of high computational power and qualified personnel. Most often, such models are based on the Reynolds Average Navier-Stokes equations (RANS) and the Large Eddy Simulation approach (LES). Unfortunately, both methods result either to less accurate or most computationally expensive models. Therefore, it is necessary to seek a resolution that is intermediate between the RANS and LES models in order to find a better balance between efficiency and accuracy, like the hybrid RANS/LES or the DES models like the one in this work. Herein, a new model is presented, that is able to estimate the initial conditions of the source (e.g. a small explosion), as well as provide the needed spatial pattern of wind statistics and ultimately calculate the atmospheric dispersion of the gas. The model is utilizing the Detached Eddy Simulation approach, in conjunction with the one-equation turbulent Spalart-Allmaras method, in the problem of atmospheric dispersion. To implement this model, a new software called the Prognostic Model for Toxic Gases Dispersion was developed and is described here. Several selected software evaluation test cases have been conducted and compared with cases found in the literature using a set of proposed model acceptance criteria. In this paper some of this cases are presented.

Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013
PublisherEnvironmental Software and Modelling Group
Pages553-557
Number of pages5
Publication statusPublished - 2013
Event15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013 - Madrid, Spain
Duration: 6 May 20139 May 2013

Other

Other15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013
CountrySpain
CityMadrid
Period6/5/139/5/13

Fingerprint

eddy
simulation
Simulation
Large Eddy Simulation
Navier-Stokes Equations
Navier-Stokes equations
large eddy simulation
Large eddy simulation
Model
Navier Stokes equations
Computational Model
Model Category
Software
Prognosis
Gases
gas
Spatial Pattern
software
Explosion
Initial conditions

Keywords

  • Detached eddy
  • Neighbourhood scale
  • Risk assessment
  • Spalart-Almaras: gas dispersion
  • Urban scale

ASJC Scopus subject areas

  • Atmospheric Science
  • Modelling and Simulation
  • Pollution

Cite this

Kakosimos, K., & Assael, M. J. (2013). H15-117: Application of detached eddy simulation to neighborhood scale atmospheric dispersion. In Proceedings of the 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013 (pp. 553-557). Environmental Software and Modelling Group.

H15-117 : Application of detached eddy simulation to neighborhood scale atmospheric dispersion. / Kakosimos, Konstantinos; Assael, Marc J.

Proceedings of the 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013. Environmental Software and Modelling Group, 2013. p. 553-557.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kakosimos, K & Assael, MJ 2013, H15-117: Application of detached eddy simulation to neighborhood scale atmospheric dispersion. in Proceedings of the 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013. Environmental Software and Modelling Group, pp. 553-557, 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013, Madrid, Spain, 6/5/13.
Kakosimos K, Assael MJ. H15-117: Application of detached eddy simulation to neighborhood scale atmospheric dispersion. In Proceedings of the 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013. Environmental Software and Modelling Group. 2013. p. 553-557
Kakosimos, Konstantinos ; Assael, Marc J. / H15-117 : Application of detached eddy simulation to neighborhood scale atmospheric dispersion. Proceedings of the 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013. Environmental Software and Modelling Group, 2013. pp. 553-557
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