A1 Journal article (refereed), original research

Deviation of continuum formulation for solid-solid momentum transfer rate in terms of spatial averaging in mixtures with large particle size ratios


Open Access publication

Publication Details
Authors: Shah Srujal, Jalali Payman
Publisher: Elsevier
Publication year: 2020
Language: English
Related Journal or Series Information: Powder Technology
Volume number: 363
Start page: 584
End page: 592
Number of pages: 9
ISSN: 0032-5910
eISSN: 1873-328X
JUFO-Level of this publication: 1
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2020100176330

Abstract

In a fluidized bed system, mean trajectories of fuel particles within the bed of fluidized inert particles are governed by the associated drag forces and characterize hydrodynamic, chemical and thermal processes taken place in the system. A large particle size ratio between the bed material and the fuel particles affects the hydrodynamics of gas-solid multiphase flows via influencing the drag forces between solid phases. The present work focuses on the analysis of forces between the two solid phases with large size ratios using the Lagrangian simulations of discrete element method (DEM). The results are spatially averaged over variable control volume size for comparison to the continuum interphase momentum transfer model. Using our DEM simulation results, a correction factor of drag force is presented versus the size of averaging control volume usable in continuum models. In addition, the role of inhomogeneity of particles distribution within the averaging box is discussed.


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Last updated on 2021-16-03 at 12:47

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