Hybrid two-fluid DEM simulation of gas-solid fluidized beds

Jin Sun, Francine Battaglia*, Shankar Subramaniam

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Simulations of gas-solid fluidized beds have been carried out using a hybrid simulation method, which couples the discrete element method (DEM) for particle dynamics with the ensemble-averaged two-fluid (TF) equations for the fluid phase. The coupling between the two phases is modeled using an interphase momentum transfer term. The results of the hybrid TF-DEM simulations are compared to experimental data and two-fluid model simulations. It is found that the TF-DEM simulation is capable of predicting general fluidized bed dynamics, i.e., pressure drop across the bed and bed expansion, which are in agreement with experimental measurements and two-fluid model predictions. In addition, the TF-DEM model demonstrates the capability to capture more heterogeneous structural information of the fluidized beds than the two-fluid model alone. The microstructures in fluidized beds are analyzed and the implications to kinetic theory for granular flows are discussed. However, the TF-DEM simulations depend on the form of the interphase momentum transfer model, which can be computed in terms of averaged or instantaneous particle quantities. Various forms of the interphase momentum transfer model are examined, and their suitability to the hybrid TF-DEM simulation approach is evaluated.

Original languageEnglish
Title of host publicationProceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006 - Fluids Engineering Division
PublisherAmerican Society of Mechanical Engineers(ASME)
ISBN (Print)0791837904, 9780791837900
DOIs
Publication statusPublished - 1 Jan 2006
Event2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006 - Chicago, IL, United States
Duration: 5 Nov 200610 Nov 2006

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
ISSN (Print)0888-8116

Conference

Conference2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006
Country/TerritoryUnited States
CityChicago, IL
Period5/11/0610/11/06

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