Thermal conduction through a vented support

(Received 15 July 1993, revised 25 October 1993, accepted 15 November 1993)

Abstract
A simplified theory of thermal conduction in a support vented with cold vapour is described which allows the construction of convenient graphs for practical applications. The very same model is employed to extend the Wexler correlation [1] beyond its classic limits and corresponding diagrams are presented for helium and nitrogen.