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The effect of liquid bridge model details on the dynamics of wet fluidized beds
Author(s) -
Wu Mingqiu,
Khinast Johannes G.,
Radl Stefan
Publication year - 2018
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.15947
Subject(s) - bridge (graph theory) , particle (ecology) , mechanics , surface tension , particle system , computational fluid dynamics , series (stratigraphy) , materials science , engineering , computer science , physics , thermodynamics , geology , medicine , paleontology , oceanography , operating system
Wet fluidized beds of particles in small periodic domains are simulated using the CFD‐DEM approach. A liquid bridge is formed upon particle‐particle collisions, which then ruptures when the particle separation exceeds a critical distance. The simulations take into account both surface tension and viscous forces due to the liquid bridge. We perform a series of simulations based on different liquid bridge formation models: (1) the static bridge model of Shi and McCarthy, (2) a simple static version of the model of Wu et al., as well as (3) the full dynamic bridge model of Wu et al. We systematically compare the differences caused by different liquid bridge formation models, as well as their sensitivity to system parameters. Finally, we provide recommendations for which systems a dynamic liquid bridge model must be used, and for which application this appears to be less important. © 2017 American Institute of Chemical Engineers AIChE J , 64: 437–456, 2018