Abstract
Heat transfer to liquid metals flowing longitudinally through unbaffled rod bundles under conditions of (a) equilateral triangular rod spacing, (b) uniform (or approaching uniform) wall heat flux, and (c) fully developed velocity and temperature profiles is reviewed. Theoretical predictions and experimental results are compared for both close and wide spacings. Recent results and current thinking on the following topics are also presented: (a) circumferential variation of rod temperature, (b) effect of rod displacement on its average heat transfer coefficient and on those of its six neighbors, (c) effect of pitch: diameter ratio on the rod-average heat transfer coefficient, and (d) the interrelated problems of wetting, oxides, and gas entrainment.
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