Accession Number : AD0638906

Title :   TRANSIENT TEMPERATURES OF ARRAYS OF PLATES AND CUBES RADIATING IN A VACUUM.

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH GEO-ASTRO PHYSICS LAB

Personal Author(s) : Winter,D. F.

Report Date : JUL 1966

Pagination or Media Count : 23

Abstract : When certain conditions are satisfied, the temperature history of an evacuated particulate medium is determined primarily by radiative exchange between surfaces of solid material. This paper presents a discussion of transient radiative heat exchange in two simple types of evacuated discontinuous media with gray surfaces: (1) a semi-infinite array of thin parallel plates and (2) a plane-bounded semi-infinite array of small cubes, contiguous at their vertices. The equations which describe heat transfer within these arrays are presented, together with numerical results. Calculations for special cases are compared with solutions of the heat conduction equation with a 'radiant conductivity' and an appropriate radiative boundary condition. Models such as those discussed may be useful in describing transient radiative heat exchange at the surface of the Moon. (Author)

Descriptors :   (*HEAT TRANSFER, PARTIAL DIFFERENTIAL EQUATIONS), VACUUM, SPACE ENVIRONMENTS, SURFACE PROPERTIES, RECTANGULAR BODIES, NUMERICAL METHODS AND PROCEDURES, TEMPERATURE, SOLIDS, THERMAL RADIATION

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE