One-and two-equation turbulence models for the prediction of complex cascade flows using unstructured grids

dc.contributor.author	Κουμπογιάννης, Δημήτριος Γ.	el
dc.contributor.author	Αθανασιάδης, Αριστοτέλης Ν.	el
dc.contributor.author	Γιαννάκογλου, Κυριάκος Χ.	el
dc.date.accessioned	2015-06-07T20:42:03Z
dc.date.available	2015-06-07T20:42:03Z
dc.date.issued	2015-06-07
dc.identifier.uri	http://hdl.handle.net/11400/15550
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.scopus.com/record/display.url?origin=recordpage&eid=2-s2.0-0036522161&citeCnt=19&noHighlight=false&sort=plf-f&src=s&sid=62A9054A815E25F2D3896574D4CE2724.fM4vPBipdL1BpirDq5Cw%3a10650&sot=autdocs&sdt=autdocs&sl=17&s=AU-ID%286507485349%29&relpos=4	en
dc.subject	Λόγος διαστάσεων
dc.subject	Φυσαλίδες
dc.subject	χημική τροποποίηση
dc.subject	κινητική ενέργεια
dc.subject	Στρωτή ροή
dc.subject	Aspect ratio (Aerofoils)
dc.subject	Bubbles
dc.subject	Chemical modification
dc.subject	Kinetic energy
dc.subject	Laminar flow
dc.title	One-and two-equation turbulence models for the prediction of complex cascade flows using unstructured grids	en
heal.type	journalArticle
heal.classification	Μαθηματικά
heal.classification	Μηχανική
heal.classification	Mathematics
heal.classification	Mechanics
heal.classificationURI	N/A-Μαθηματικά
heal.classificationURI	N/A-Μηχανική
heal.classificationURI	http://skos.um.es/unescothes/C02437
heal.classificationURI	http://skos.um.es/unescothes/C02449
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85008696
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85074205
heal.identifier.secondary	DOI: 10.1016/S0045-7930(01)00086-X
heal.language	en
heal.access	campus
heal.recordProvider	Τεχνολογικό Εκπαιδευτικό Ίδρυμα Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Ενεργειακής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2003-03
heal.bibliographicCitation	Koubogiannis, D.G., Athanasiadis, A.N. and Giannakoglou, K.C. (2003) One- and two-equation turbulence models for the prediction of complex cascade flows using unstructured grids. Computers and Fluids. [Online] 32 (3), pp.403-430. Available from: http://www.scopus.com [Accessed 07/06/2015]	en
heal.abstract	One- and two-equation, low-Reynolds eddy-viscosity turbulence models are employed in the context of a primitive variable, finite volume, Navier-Stokes solver for unstructured grids. Through the study of the complex flow in a controlled-diffusion compressor cascade at off-design conditions, the ability of the models under consideration to predict the laminar separation bubble close to the leading edge and the boundary layer development is investigated. In order to control the unphysical growth of turbulent kinetic energy near the leading edge stagnation point, appropriate modifications to the conventional models are employed and tested. All of them improve the leading edge flow patterns and significantly affect the size of the predicted laminar separation bubble. The use of an adequately refined mesh around the airfoil, that is formed by triangles placed in a quasi-structured way, allows for the generation of grid elements of moderate aspect ratios. This helps to readily overcome any relevant problems of accuracy; a second-order upwind scheme without flux limiters or least squares approximations is successfully employed for the gradients. The test case includes quasi-3D effects by considering the streamtube thickness variation in the governing equations.	en
heal.publisher	Elsevier	en
heal.journalName	Computers and Fluids	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true