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Title: Natural convection of liquid metal in a vertical annulus with lateral and volumetric heating in the presence of a horizontal magnetic field
Authors: Κακαράντζας, Σωτήριος Χ.
Σαρρής, Ιωάννης Ε.
Βλάχος, Νικόλας Σ.
Item type: Journal article
Keywords: Free convection;MHD;Annular cavity;Lateral heating;Volumetric heating;Liquid metals;Υγρά μέταλλα;Ογκομετρική θέρμανση;Ελεύθερη μεταφορά;Πλευρική θέρμανση;Δακτυλιοειδής κοιλότητα
Subjects: Technology
Issue Date: 7-May-2015
Date of availability: 7-May-2015
Publisher: Elsevier
Abstract: MHD free convection of a liquid metal is studied in a closed vertical annulus in which the upper and bottom walls are adiabatic while the cylindrical walls are kept at different temperatures. The flow is driven by two mechanisms; the temperature difference between the two cylindrical walls and the volumetric heating. A constant horizontal magnetic field is also imposed resisting the fluid motion. The laminar and turbulent regimes of the flow are assessed by performing three-dimensional direct numerical simulations. The results show that in the absence of the magnetic field, turbulent flow is developed in most of the cases, while as the magnetic field increases the flow becomes laminar. The highest temperature is found in the upper-central part of the annular cavity when the fluid is heated volumetrically, resulting in the creation of two convection currents as the hot fluid ascends in the central part and descends close to both colder walls. The Hartmann and Roberts layers developing near the walls normal and parallel to the magnetic field, respectively, are found to be responsible for the loss of axisymmetry of the present flow.
Language: English
Citation: KAKARANTZAS, S.C., SARRIS, I.E. & VLACHOS, N.S. (2011). Natural convection of liquid metal in a vertical annulus with lateral and volumetric heating in the presence of a horizontal magnetic field. International Journal of Heat and Mass Transfer. [Online] 54 (15-16). p.3347–3356. Available from:[Accessed 16/04/2011]
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
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