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Thermal conductivity of packed beds
Author(s) -
Schotte William
Publication year - 1960
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690060113
Subject(s) - thermal conductivity , packed bed , thermal conduction , mean free path , thermal , particle (ecology) , materials science , particle size , thermodynamics , thermal radiation , gas phase , heat transfer , chemistry , composite material , chromatography , optics , physics , geology , oceanography , scattering
A correlation has been developed to predict the thermal conductivity of packed beds for various conditions of pressure, temperature, and particle size. The correlation takes into account the reduction in thermal conductivity of the gas phase at lower pressures when the mean free path of the gas molecules is of the same order as the distance between particles which are effective in transferring heat. Radiation becomes significant for large particles and high temperatures. A new relationship for the radiation contribution to the thermal conductivity of packed beds has been developed.