Abstract
Woven-screen or crossed-rod types of matrixes may be of interest as fuel-element geometries for certain types of nuclear reactors as well as in many other heat-transfer and mass-transfer systems. Basic heat-transfer and flow-friction design data for these geometries are presented graphically, in nondimensional form, for a range of Reynolds numbers from 5 to 100,000 and matrix porosities from 0.60 to 0.83. Algebraic equations which adequately represent these data are also given and these may be used for interpolation and, at least tentatively, for a limited extrapolation beyond the range of porosities covered in this program.

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