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Sixth International Symposium on Turbulence and Shear Flow Phenomena
June, 22-24, 2009 , Seoul National University, Seoul, Korea

DOI: 10.1615/TSFP6

TURBULENT EFFECTS OF LIQUID METAL FLOW UNDER STRONG FRINGING MAGNETIC FIELDS

pages 687-692
DOI: 10.1615/TSFP6.1100
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RÉSUMÉ

This paper presents direct numerical simulations of a liquid metal flow under a space-varying magnetic field in an insulating circular duct. This is a generalization of a magnetohydrodynamic (MHD hereafter) benchmark case (MHD benchmark, 2005) in the nuclear fusion field. The benchmark was proposed after the experiments of Reed et al. (1987) owing to its similarity to the typical parameters appearing in liquid metal blankets of nuclear fusion reactors (Molokov and Reed, 2003). The main task at hand is to accurately define the transitional effects (suppression, triggering, intermittency) related to fringing magnetic fields and turbulence. For that purpose, the present paper addresses two qualitatively different cases: the first one considers the case of a turbulent flow (Reb = 7972, Reτ ~ 520) entering a strong magnetic field (case MHD1) while the later considers the MHD flow leaving a strong magnetic field (case MHD 2). For brevity, this paper presents only some illustrative results concerning different Ha numbers for the case MHD1 and one very strong magnetic field (Ha = 7000) for the case MHD2. Additionally, preliminary purely hydrodynamic computations are presented (case HD, at an identical flow regime with the MHD cases). An excellent agreement has been obtained against both previous experimental (Durst et al., 1995) and numerical results (Wagner et al., 2001).

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