Radiative Heat Transfer Through Composite Materials.

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Abstract:

MATERIALS, HEAT TRANSFER, POROUS MATERIALS, POWDERS, FOAM, FIBERS, THERMAL INSULATION, THERMAL CONDUCTIVITY, THERMAL RADIATIONRADIATIVE TRANSFERRadiative heat transfer in inhomogeneous materials is governed by the photon mean free path. For long-wave photons, the mean free path depends on the size and shape of the individual grains and, where applicable, of the voids. Long-wave photons have long mean free paths and play an important role in the heat transfer. In some cases they cause the radiative thermal conductivity at moderately high temperatures to be larger than one would expect by extrapolating from highest temperatures above 2000K according to a T cubed law. Some special cases are treated including polycrystalline solids, densely packed powders, foams and fibrous aggregates. Author

Author(s):
Greenberg, I. N. ; Klemens, P. G.
Author Organization(s):
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
Descriptive Note:
Technical rept.,
Pagination:
0015

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ECOM-4065
Task Number(s):
1T061102B11A01
Project Number(s):
DA-1-T-061102-B-11-A
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*COMPOSITE MATERIALS, *HEAT TRANSFER), POROUS MATERIALS, POWDERS, FOAM, FIBERS, THERMAL INSULATION, THERMAL CONDUCTIVITY, THERMAL RADIATION
Field(s)/Group(s):
Laminates and Composite Materials, Thermodynamics
Keyword(s):
RADIATIVE TRANSFER
Report Date:
1972 Dec 01