Heat-Transfer and Flow-Friction

The paper presents a continuation of the program on porous media heat-transfer and flow-friction behavior previously covered in References [2b] and [3b].1 All the previous results of interest to the designer on woven-screen matrices and crossed-rod matrices of a random configuration are summarized here. In addition, new design results for the regular in-line and regular staggered crossed-rod-matrix configurations are re-ported. Matrices of the type considered here may find application as heat-transfer surface geometries for nuclear-reactor fuel elements, for electrical resistance heaters and for periodic-flow-type heat exchangers used for gas-turbine regenerators, and some air-conditioning applications. T H I S study follows TR-Nos. 10, 16, and 28 [1,2a, 3a] in presenting design results for the convective heat-transfer and flow-friction behavior for flow through porous media. Locke [1] developed a transient test technique for establishing the low Reynolds-number heat-transfer characteristics. Coppage [2a] then utilzed this technique in establishing the characteristic