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Studies on axial effective thermal conductivities in packed beds
Author(s) -
Yagi Sakae,
Kunii Daizo,
Wakao Noriaki
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.690060407
Subject(s) - thermal conductivity , raschig ring , packed bed , materials science , conductivity , thermal , thermal conduction , mechanics , composite material , thermodynamics , chemistry , physics , chromatography
The axial effective thermal conductivities of packed beds were determined by measuring the axial temperature gradients at steady state, the heat being conducted in the direction opposite to that of air. The present experiments were carried out with the beds of glass beads, metallic balls, broken pieces of limestone, and Raschig rings, taken in separate experiments. It was found that the axial effective thermal conductivity increases more with the increase of air flow than it does in the case of radial conductivity. The axial effective thermal conductivity coincides with the radial conductivity when N Re → 0.