Evaluation of Reynolds stress, k-ε and RNG k-ε turbulence models in street canyon flows using various experimental datasets

Koutsourakis, N; Bartzis, JG; Markatos, NC

dc.contributor.author	Koutsourakis, N	en
dc.contributor.author	Bartzis, JG	en
dc.contributor.author	Markatos, NC	en
dc.date.accessioned	2014-03-01T02:08:53Z
dc.date.available	2014-03-01T02:08:53Z
dc.date.issued	2012	en
dc.identifier.issn	15677419	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29749
dc.subject	CFD modelling	en
dc.subject	Experimental datasets	en
dc.subject	Reynolds-stress model	en
dc.subject	RNG k-ε	en
dc.subject	Turbulence models evaluation	en
dc.subject	Urban street canyons	en
dc.subject.other	airflow	en
dc.subject.other	computational fluid dynamics	en
dc.subject.other	data set	en
dc.subject.other	Navier-Stokes equations	en
dc.subject.other	numerical model	en
dc.subject.other	Reynolds number	en
dc.subject.other	street canyon	en
dc.subject.other	turbulence	en
dc.subject.other	urban area	en
dc.title	Evaluation of Reynolds stress, k-ε and RNG k-ε turbulence models in street canyon flows using various experimental datasets	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10652-012-9240-9	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10652-012-9240-9	en
heal.publicationDate	2012	en
heal.abstract	In this study the Reynolds-averaged Navier-Stokes computational fluid dynamics methodology is used, which has proved to be a powerful tool for the simulations of the airflow and pollutant dispersion in the atmospheric environment. The interest is focused on the urban areas and more specifically on the street canyons, several types of which are examined in order to evaluate the performance of various turbulence models, including a Reynolds-stress model and variations of the k-ε model. The results of the two-dimensional simulations are compared with measurements from a diversity of independent street canyon experimental datasets, covering a wide range of aspect ratios, free stream velocities and roughnesses. This way more general and reliable conclusions can be reached about the applicability, accuracy and ease of use of each turbulence model. In this work, the renormalization group k-ε presented better results in most cases examined, while the Reynolds-stress model did not stand up for the expectations and also exhibited convergence problems. © 2012 Springer Science+Business Media B.V.	en
heal.journalName	Environmental Fluid Mechanics	en
dc.identifier.doi	10.1007/s10652-012-9240-9	en
dc.identifier.volume	12	en
dc.identifier.issue	4	en
dc.identifier.spage	379	en
dc.identifier.epage	403	en