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Experimental and numerical investigation of sands and Geldart A biomass co‐fluidization
Author(s) -
Lu Liqiang,
Yu Jia,
Gao Xi,
Xu Yupeng,
Shahnam Mehrdad,
Rogers William A.
Publication year - 2020
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.16969
Subject(s) - fluidization , drag , fluidized bed , pressure drop , mixing (physics) , discrete element method , mechanics , drag coefficient , materials science , geology , geotechnical engineering , thermodynamics , physics , quantum mechanics
This article investigated the fluidization of sands and small Geldart A biomass mixtures. The mixture fluidized like Geldart A type particles with a uniform bed expansion regime before bubbling. The video recorded color distance between pure sands and sands–biomass mixtures was used to estimate the sands–biomass mixing. The coarse‐grained computational fluid dynamics–discrete element method with a hybrid drag model which couples the Syamlal–O'Brien drag and a filtered drag can capture the mixing while the simulation with Gidaspow drag predicted a segregated bed. The simulations were further validated with experimental measured pressure drops. The time averaged pressure drop equals the weight of the bed material, however, its fluctuation is about three times of the bed material fluctuation.