Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/9886
Title: Magnetohydrodynamic natural convection in a vertical cylindrical cavity with sinusoidal upper wall temperature
Authors: Κακαράντζας, Σωτήριος Χ.
Σαρρής, Ιωάννης Ε.
Γραίκος, Α.Π.
Βλάχος, Νικόλας Σ.
Item type: Journal article
Keywords: Natural convection;Magnetohydrodynamics;Liquid metals;Sinusoidal wall temperature;Computational fluid dynamics;Φυσική συναγωγή;μαγνητοϋδροδυναμική;Υγρά μέταλλα;Ημιτονοειδής θερμοκρασία τοιχώματος;Υπολογιστική ρευστοδυναμική
Subjects: Technology
Engineering
Τεχνολογία
Μηχανική
Issue Date: 7-May-2015
15-Jan-2009
Date of availability: 7-May-2015
Publisher: Elsevier
Abstract: A series of numerical simulations were performed in order to study liquid metal MHD natural convection in a vertical cylindrical container with a sinusoidal temperature distribution at the upper wall and the other surfaces being adiabatic. Starting from the basic hydrodynamic case, the effect of vertical (axial) and horizontal magnetic fields is assessed. Depending on the magnitude of the Rayleigh and Hartmann numbers, both turbulent and laminar (azimuthally symmetric or not) flows are observed. The results show that the increase of Rayleigh number promotes heat transfer by convection while the increase of Hartmann number favors heat conduction. The vertical magnetic field reduces the Nusselt number more than the horizontal. The circulation patterns for the most convective cases are confined close to the top corner of the container with the simultaneous formation of a secondary flow pattern at the bottom corner, while for the more conductive cases only one circulation pattern exists covering the entire domain.
Language: English
Citation: KAKARANTZAS, S.C., SARRIS, I.E., GRECOS, A.P. & VLACHOS, N.S. (2009). Magnetohydrodynamic natural convection in a vertical cylindrical cavity with sinusoidal upper wall temperature. International Journal of Heat and Mass Transfer. [Online] 52 (1-2). p.250-259. Available from: http://www.sciencedirect.com/[Accessed 28/08/2008]
Journal: International Journal of Heat and Mass Transfer
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/9886
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