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Seventh International Symposium on Turbulence and Shear Flow Phenomena
July, 28-31, 2011, Ottawa Convention Centre, Ottawa, Canada

DOI: 10.1615/TSFP7

DNS OF SINGLE BUBBLE MOTION IN LIQUID METAL AND THE INFLUENCE OF A MAGNETIC FIELD

pages 1-6
DOI: 10.1615/TSFP7.680
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摘要

The ascent of a single Argon bubble in a column of quiescent liquid metal is studied by means of direct numerical simulation using an immersed boundary method. An additional magnetic field in the direction of gravity is shown to influence the bubble dynamics substantially. An increase in time-averaged bubble Reynolds number is found for large bubbles and a decrease for small bubbles when increasing the magnetic interaction parameter. The bubble Strouhal number as a dimensionless frequency is reduced with magnetic field for all bubbles considered. The zig-zag trajectory in the purely hydrodynamic case becomes more rectilinear and vortical structures in the bubble wake are considerably damped.

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