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Particles flow pattern and local heat transfer around tube in moving bed
Author(s) -
Takeuchi Hiromi
Publication year - 1996
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.690420613
Subject(s) - tube (container) , heat transfer , mechanics , flow (mathematics) , materials science , thermodynamics , composite material , physics
Flow visualization of flowing particles around a tube of various types of tube arrangements in a moving bed was studied using X‐ray video films to obtain a relation between particles behavior and local heat‐transfer coefficients. A stagnant part of solid particles was observed on the tube in the case of a staggered arrangement. This part did not appear in the case of the single tube and the single row of tubes. The measured local heat‐transfer coefficients around a tube was decreased in this stagnant part. Furthermore, influences of different tube arrangements both on flow patterns of particles and on local heat‐transfer coefficients between tubes and bed were examined.