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Heat Transfer to an Isolated Bubble Rising in a High‐Temperature Incipiently Fluidized Bed
Author(s) -
Wu Wenyuan,
Agarwal Pradeep K.
Publication year - 2004
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450820222
Subject(s) - bubble , heat transfer coefficient , thermodynamics , fluidized bed , heat transfer , materials science , mass transfer , mechanics , mass transfer coefficient , emulsion , chemistry , physics , biochemistry
Very few experimental data are available on the heat transfer between bubble and emulsion phases; no data are available at high temperatures. The effects of bed particle type and size, bubble size, and bed temperature on the heat transfer coefficient were examined in this experimental and modelling study. The heat transfer coefficient was found to increase to a maximum, and then decrease as the bubble mass increased in the bubble mass range investigated. Increase in bed temperature led to a significant decrease in the heat transfer coefficient. The simple mathematical model developed earlier was extended to include operation at high temperature.