Large-eddy simulations of the turbulent Hartmann flow close to the transitional regime

dc.contributor.author	Σαρρής, Ιωάννης Ε.	el
dc.contributor.author	Κασινός, Σταύρος Χ.	el
dc.contributor.author	Carati, Daniele	it
dc.date.accessioned	2015-05-05T19:59:49Z
dc.date.available	2015-05-05T19:59:49Z
dc.date.issued	2015-05-05
dc.identifier.uri	http://hdl.handle.net/11400/9771
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://scitation.aip.org/	en
dc.subject	Magnetohydrodynamic
dc.subject	applied magnetic field
dc.subject	Numerical method
dc.subject	Αριθμητική μέθοδος
dc.subject	Εφαρμοζόμενο μαγνητικό πεδίο
dc.subject	Μαγνητοϋδροδυναμική
dc.title	Large-eddy simulations of the turbulent Hartmann flow close to the transitional regime	en
heal.type	journalArticle
heal.classification	Technology
heal.classification	Engineering
heal.classification	Τεχνολογία
heal.classification	Μηχανική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://zbw.eu/stw/descriptor/19795-3
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Μηχανική
heal.keywordURI	http://zbw.eu/stw/descriptor/19591-5
heal.identifier.secondary	DOI: 10.1063/1.2757710
heal.language	en
heal.access	free
heal.publicationDate	2007
heal.bibliographicCitation	SARRIS, I.E., KASSINOS, S.C. & CARATI, D. (2007). Large-eddy simulations of the turbulent Hartmann flow close to the transitional regime. Physics of Fluids. [Online] 19 (8). p.085109 - 085109-9. Available from: http://scitation.aip.org/[Accessed 28/08/2007]	en
heal.abstract	A series of large-eddy simulations(LES) of turbulent and transitional channel flows of a conductive fluid under the effect of a uniform magnetic field applied in the wall-normal direction, usually referred to as Hartmann flows, are performed using the dynamic Smagorinsky model. The flow is characterized by the hydrodynamicReynolds numberRe and the Hartmann number Ha that is related to the strength of the external magnetic field. Previous measurements and works on stability analysis have shown that a critical modified Reynolds number, based on the Hartmann layer thickness R=Re∕Ha, exists at approximately R=380. Here, the LES are used to investigate the laminarization of flow when decreasing R. Also, similarities of the turbulent flows are explored for different values of Re and Ha but the same values of R or of the interaction parameter N=Ha2/Re. The LES confirm that R is the relevant parameter that describes the transition and a critical Reynolds number for relaminarization is observed at R≈500. However, for turbulent flows at moderate values of the Ha and Re as considered in this study, the similarity with respect to N appears to be better than for R, especially for the first order statistics. Finally, the importance of the dynamic Smagorinsky model as the Hartmann number increases is discussed.	en
heal.publisher	American Institute of Physics	en
heal.journalName	Physics of Fluids	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true