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Title: Direct numerical simulation of a heat removal configuration for fusion blankets
Authors: Κακαράντζας, Σωτήριος Χ.
Γραίκος, Α.Π.
Βλάχος, Νικόλας Σ.
Σαρρής, Ιωάννης Ε.
Knaepen, Bernard
Contributors: Carati, Daniele
Item type: Journal article
Keywords: Natural convection;Magnetohydrodynamics;Direct numerical simulation;Heat removal;Fusion blankets;Φυσική μεταφορά θερμότητας;Μαγνητοϋδροδυναμική;Άμεση αριθμητική προσομοίωση;Απομάκρυνση θερμότητα;Καλύμματα Fusion
Subjects: Technology
Issue Date: 5-May-2015
Date of availability: 5-May-2015
Publisher: Elsevier
Abstract: A series of direct numerical simulations (DNS) are performed to study the natural convection heat transfer between concentric cylinders at several Rayleigh and Hartmann numbers. The buoyant flow is driven by the temperature difference between the inner and the outer walls, with the inner wall being at lower temperature, while an external transverse magnetic field is imposed. Both laminar and turbulent flows are observed depending on the magnitude of the Rayleigh and Hartmann numbers. The resulting flow structures of the cases studied were both laminar and turbulent. The results show the 3D nature of turbulence and the tendency of the magnetic field to form narrow Hartmann layers, 3D jets and wakes at specific azimuthal angles. Some particular features of the turbulent regime as well as the heat transfer are also investigated. The magnetic field effect on the convective heat transfer is assessed via the Nusselt number showing that conduction dominates as the Hartmann number increases.
Language: English
Citation: KAKARANTZAS, S.C., GRECOS, A.P., VLACHOS, N.S., SARRIS, I.E., KNAEPEN, B., et al. (2007). Direct numerical simulation of a heat removal configuration for fusion blankets. Energy Conversion and Management. [Online] 48 (11). p.2775–2783. Available from:[Accessed 11/09/2007]
Journal: Energy Conversion and Management
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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