CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model

Zhao Chen, Lin Jiang, Mofan Qiu, Meng Chen, Rongzheng Liu and Malin Liu
Additional contact information
Zhao Chen: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Lin Jiang: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Mofan Qiu: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Meng Chen: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Rongzheng Liu: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Malin Liu: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

Energies, 2021, vol. 14, issue 8, 1-20

Abstract: Particle adhesion is of great importance to coating processes due to its effect on fluidization. Currently, Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) has become a powerful tool for the study of multiphase flows. Various contact force models have also been proposed. However, particle dynamics in high temperature will be changed with particle surface properties changing. In view of this, an adhesion model is developed based on approaching-loading-unloading-detaching idea and particle surface change under high temperature in this paper. Analyses of the adhesion model are given through two particle collision process and validated by experiment. Effects of inlet gas velocity and adhesion intensity on spouted bed dynamics are investigated. It is concluded that fluidization cycle will be accelerated by adhesion, and intensity of fluidization will be marginally enhanced by slight adhesion. Within a certain range, increasing inlet gas velocity will lead to strong intensity of particle motion. A parameter sensitivity comparison of linear spring-damping model and Hertz-Mindlin Model is given, which shows in case of small overlaps, forces calculated by both models have little distinction, diametrically opposed to that of large overlaps.

Keywords: CFD-DEM; adhesion; temperature; head-on collision (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/8/2276/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/8/2276/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:8:p:2276-:d:538586

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().