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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received June 24, 2022
Revised October 27, 2022
Accepted November 30, 2022

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hydrodynamics and particles mixing in rectangular spouted bed with different base geometries using CFD-DEM

Mohammad Karimi Zand and Maysam Saidi^†

Mechanical Engineering Department, Faculty of Engineering, Razi University, Kermanshah, Iran

msaidi@razi.ac.ir

Korean Journal of Chemical Engineering, June 2023, 40(6), 1297-1308(12), 10.1007/s11814-022-1362-2

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Abstract

A numerical study on the flow field and particle mixing behavior in spouted beds with the aim of considering different base shapes was carried out using CFD-DEM modeling. Four spouted beds with different base angles of 180, 120, 90 and 60 degrees were compared. In order to have a qualitative and quantitative analysis on the mixing behavior, particle tracing and Lacey mixing index calculation were executed for the models. Rectangular spouted beds generate dead-zones in the corners of the system that causes less ultimate mixing index value. As the base angle decreases, the mixing index tends to increase. A mixing degree of the case with 180 degrees base angle reaches no more than 79% at the end of the simulation, which is the lowest, whereas a mixing degree of the 60 degrees base angle reaches the maximum value of 97%, which is the highest. Particle tracing conducted in these models indicates that this matter is due to the observed fact that with more incline of the base walls, particles slip more into the spout, thus entering the circulating flow. The results also indicate this increase in the slope has almost no effect on the rate which the mixing index reaches its maximum value.

Keywords

CFD-DEM Hydrodynamics Inclined Base Walls Mixing Rectangular Spouted Bed

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