On the limits of validity of the low magnetic reynolds number approximation in MHD natural-convection heat transfer

dc.contributor.author	Σαρρής, Ιωάννης Ε.	el
dc.contributor.author	Ζήκος, Γ.Κ.	el
dc.contributor.author	Γραίκος, Α.Π.	el
dc.contributor.author	Βλάχος, Νικόλας Σ.	el
dc.date.accessioned	2015-06-07T19:40:13Z
dc.date.available	2015-06-07T19:40:13Z
dc.date.issued	2015-06-07
dc.identifier.uri	http://hdl.handle.net/11400/15539
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-s2.0-33748507558&citeCnt=0&noHighlight=false&sort=plf-f&src=s&sid=62A9054A815E25F2D3896574D4CE2724.fM4vPBipdL1BpirDq5Cw%3a5800&sot=autdocs&sdt=autdocs&sl=18&s=AU-ID%2835848021500%29&relpos=22	en
dc.subject	Προσέγγιση θεωρίας
dc.subject	υπολογιστική προσομοίωση
dc.subject	εξασθένηση
dc.subject	Μεταφορά θερμότητας
dc.subject	επιδράσεις μαγνητικού πεδίου
dc.subject	Approximation theory
dc.subject	Computer simulation
dc.subject	Damping (Mechanics)
dc.subject	Heat--Convection
dc.subject	Magnetic field effects
dc.title	On the limits of validity of the low magnetic reynolds number approximation in MHD natural-convection heat transfer	en
heal.type	journalArticle
heal.classification	Τεχνολογία
heal.classification	Μηχανική
heal.classification	Technology
heal.classification	Engineering
heal.classificationURI	N/A-Τεχνολογία
heal.classificationURI	N/A-Μηχανική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85133147
heal.classificationURI	http://skos.um.es/unescothes/C01363
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85006190
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85029533
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85035578
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85059761
heal.identifier.secondary	DOI: 10.1080/10407790500459403
heal.language	en
heal.access	campus
heal.recordProvider	Τεχνολογικό Εκπαιδευτικό Ίδρυμα Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Ενεργειακής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2006-05
heal.bibliographicCitation	Sarris, I.E., Zikos, G.K., Grecos, A.P. and Vlachos, N.S. (2006) On the limits of validity of the low magnetic reynolds number approximation in MHD natural-convection heat transfer. Numerical Heat Transfer, Part B: Fundamentals. [Online] 50 (2), pp.157-180. Available from: http://www.scopus.com [Accessed 07/06/2015]	en
heal.abstract	In the majority of magnetohydrodynamic (MHD) natural-convection simulations, the Lorentz force due to the magnetic field is suppressed into a damping term resisting the fluid motion. The primary benefit of this hypothesis, commonly called the low- R m approximation, is a considerable reduction of the number of equations required to be solved. The limitations in predicting the flow and heat transfer characteristics and the related errors of this approximation are the subject of the present study. Results corresponding to numerical solutions of the full MHD equations, as the magnetic Reynolds number decreases to a value of 10 -3 , are compared with those of the low- R m approximation. The influence of the most important parameters of MHD natural-convection problems (such as the Grashof, Hartmann, and Prandtl numbers) are discussed according to the magnetic model used. The natural-convection heat transfer in a square enclosure heated laterally, and subject to a transverse uniform magnetic field, is chosen as a case study. The results show clearly an increasing difference between the solutions of the full MHD equations and low- R m approximation with increasing Hartmann number. This difference decreases for higher Grashof numbers, while for Prandtl numbers reaching lower values like those of liquid metals, the difference increases.	en
heal.publisher	Taylor & Francis	en
heal.journalName	Numerical Heat Transfer, Part B: Fundamentals	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true