Abstract
The magnetohydrodynamic (MHD) effect on NaK-nitrogen two-phase flow and heat transfer has been experimentally studied in a vertical round tube in a transverse magnetic field. This study covered a wide range of two-phase flow patterns from bubbly flow to annular/annular-dispersed flow, including flow pattern observation and measurements of phase distributions, liquid film behavior and heat transfer coefficients. MHD effects on local flow structures and heat transfer mechanisms have been discussed based on these measurements. It has been found that the application of a magnetic field brought about a significant asymmetric behavior both in two-phase flow structures and heat transfer. The angular dependence of heat transfer in annular/annular-dispersed flow is particularly stressed.
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