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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

ZONAL FLOWS IN MAGNETOHYDRODYNAMIC (MHD) TURBULENCE

pages 699-702
DOI: 10.1615/TSFP6.1120
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要約

Spontaneous spin-up of two-dimensional MHD turbulence is investigated in different wall-bounded geometries by means of direct numerical simulation. It is shown that in square and elliptic geometries the flow has a strong tendency to generate angular momentum from initial conditions free from angular momentum. In circular geometry this tendency is absent. It is shown that the generation of angular momentum in non-axisymmetric geometries can be enhanced by increasing the magnetic pressure. The effect is stronger at higher Reynolds numbers. The generation of angular fields, (or magnetic angular momentum), previously observed at low Reynolds numbers, is weak but persistent in both the circular and elliptic geometries.

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