Abstract
Numerical calculations have been performed on liquid-metal magnetohydrodynamic (MHD) flows in rectangular channels with wavelike uneven walls in order to propose a flow channel in which the MHD pressure drop decreases. The calculations have been carried out for a Hartmann number of 10,000, a wall conductance ratio of 0.05, and channel aspect ratios of 1/4 and 1/9, in order to simulate typical conditions proposed to fusion reactor blankets. In the range examined in the present calculations, the Poiseuille number, which is the product of pressure gradient and Reynolds number, decreases to about half at maximum of that in a corresponding base case, i.e. a rectangular channel with flat walls.
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