SECTION BFactors From Differential Elements to Finite Areas

B-8: Differential planar element to plane rectangle. Planes containing dA_{1}and A_{2}intersect at angle 0 < Φ < π. Element dA_{1}lies on normal to line of intersection between planes with origin at one corner of rectangle.

Reference: Hamilton and Morgan, 1952. (See also Chung and Kermani)

Definitions:

A=a/b;C=c/b;X=1/[A^{2}+C^{2}-2ACcosΦ]^{1/2};Y=(1+C^{2}sin^{2}Φ)^{1/2}Governing equation:

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