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Title: Investigation of particle–wall interaction in a pseudo-2D fluidized bed using CFD-DEM simulations

Abstract

Here, we report on discrete element method simulations of a pseudo-two-dimensional (pseudo-2D) fluidized bed to investigate particle–wall interactions. Detailed information on macroscopic flow field variables, including solids pressure, granular temperature, and normal and tangential wall stresses are analyzed. The normal wall stress differs from the solids pressure because of the strong anisotropic flow behavior in the pseudo-2D system. A simple linear relationship exists between normal wall stress and solids pressure. In addition, an effective friction coefficient can be derived to characterize particle–wall flow interaction after evaluating the normal and tangential wall stresses. The effects of inter-particle and particle–wall friction coefficients are evaluated. Strong anisotropic flow behavior in the pseudo-2D system needs to be considered to validate the two-fluid model where the boundary condition is usually developed based on an isotropic assumption. The conclusion has been confirmed by simulation with different particle stiffnesses. Assumptions in the newly developed model for 2D simulation are further examined against the discrete element method simulation.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. National Energy Technology Lab. (NETL), Morgantown, WV (United States); AECOM, Morgantown, WV (United States)
  2. China Univ. of Petroleum, Beijing (China)
  3. Univ. Carlos III of Madrid, Madrid (Spain)
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Morgantown, WV (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1478190
Grant/Contract Number:  
FE0004000
Resource Type:
Accepted Manuscript
Journal Name:
Particuology
Additional Journal Information:
Journal Volume: 25; Journal Issue: C; Journal ID: ISSN 1674-2001
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Gas–solid flow; Fluidized bed; Computational fluid dynamics; Discrete element method; Particle–wall interaction; Two-dimensional flow

Citation Formats

Li, Tingwen, Zhang, Yongmin, and Hernández-Jiménez, Fernando. Investigation of particle–wall interaction in a pseudo-2D fluidized bed using CFD-DEM simulations. United States: N. p., 2015. Web. doi:10.1016/j.partic.2015.06.001.
Li, Tingwen, Zhang, Yongmin, & Hernández-Jiménez, Fernando. Investigation of particle–wall interaction in a pseudo-2D fluidized bed using CFD-DEM simulations. United States. doi:10.1016/j.partic.2015.06.001.
Li, Tingwen, Zhang, Yongmin, and Hernández-Jiménez, Fernando. Fri . "Investigation of particle–wall interaction in a pseudo-2D fluidized bed using CFD-DEM simulations". United States. doi:10.1016/j.partic.2015.06.001. https://www.osti.gov/servlets/purl/1478190.
@article{osti_1478190,
title = {Investigation of particle–wall interaction in a pseudo-2D fluidized bed using CFD-DEM simulations},
author = {Li, Tingwen and Zhang, Yongmin and Hernández-Jiménez, Fernando},
abstractNote = {Here, we report on discrete element method simulations of a pseudo-two-dimensional (pseudo-2D) fluidized bed to investigate particle–wall interactions. Detailed information on macroscopic flow field variables, including solids pressure, granular temperature, and normal and tangential wall stresses are analyzed. The normal wall stress differs from the solids pressure because of the strong anisotropic flow behavior in the pseudo-2D system. A simple linear relationship exists between normal wall stress and solids pressure. In addition, an effective friction coefficient can be derived to characterize particle–wall flow interaction after evaluating the normal and tangential wall stresses. The effects of inter-particle and particle–wall friction coefficients are evaluated. Strong anisotropic flow behavior in the pseudo-2D system needs to be considered to validate the two-fluid model where the boundary condition is usually developed based on an isotropic assumption. The conclusion has been confirmed by simulation with different particle stiffnesses. Assumptions in the newly developed model for 2D simulation are further examined against the discrete element method simulation.},
doi = {10.1016/j.partic.2015.06.001},
journal = {Particuology},
number = C,
volume = 25,
place = {United States},
year = {2015},
month = {9}
}

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