A circular cone of diameter D with a length L is positioned on a common axis with a circul...

A circular cone of diameter D with a length L is positioned on a common axis with a circular disk, also of diameter D, at a distance L (Fig. P13-18 on the next page). A cylindrical surface of diameter D with a length L and a circular disk, of the same diameter D, are oriented coaxially at a distance L. Determine the view factors F12 for the two geometries. Which of the two geometries has the higher view factor value?

FIGURE P13–18