Journal
PHYSICS OF FLUIDS
Volume 30, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5048286
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Funding
- US NSF [CBET 1435269, CBET 1803730]
- Deutsche Forschungsgemeinschaft (DFG) [Sh405/8]
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The downward flow in a vertical duct with one heated and three thermally insulated walls is analyzed numerically using the two-dimensional approximation valid in the asymptotic limit of an imposed strong transverse magnetic field. The work is motivated by the design of liquid metal blankets with poloidal ducts for future nuclear fusion reactors, in which the main component of the very strong magnetic field is perpendicular to the flow direction and very strong heating is applied at the wall facing the reaction chamber. The flow is found to be steady-state or oscillating depending on the strengths of the heating and magnetic field. A parametric study of the instability leading to the oscillations is performed. It is found among other results that the flow is unstable and develops high-amplitude temperature oscillations at the conditions typical for a fusion reactor blanket. Published by AIP Publishing.
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