Impact velocity-dependent restitution coefficient using a coupled Eulerian fluid phase-Eulerian solid phase-Lagrangian discrete particles phase model in gas-monodisperse particles internally circulating fluidized bed

Zhang, Qinghong; Wang, Shuyan; Lu, Huilin; Wang, Qiujing; Tao, Ming; Liu, Guodong

doi:10.1016/j.ijmultiphaseflow.2018.04.002

Cited by 7 publications

(2 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure shows the particle distribution and gas fractions predicted by Lagrangian MP-PIC modeling with the Lun model and the Harris–Crighton model. In the simulation, e = 0.95 which is referred to refs – , and the drag model is the Ergun-WenYu (Gidaspow) equation. The isotropy model is applied.…”

Section: Validation Of Simulationmentioning

confidence: 99%

Investigation of CO₂ Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation

Tan

Maroto‐Valer

2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Carbon dioxide (CO 2 ) photoreduction is a promising process for both mitigating CO 2 emissions and providing chemicals and fuels. A gas–solid two-phase annular fluidized bed photoreactor (FBPR) would be preferred for this process due to its high mass-transfer rate and easy operation. However, CO 2 photoreduction using the FBPR has not been widely researched to date. The Lagrangian multiphase particle-in-cell (MP-PIC) simulation with computational fluid dynamic models is a new and robust approach to explore the multiphase reaction system in the gas–solid fluidized bed. Therefore, the purpose of this paper is to investigate CO 2 photoreduction in the FBPR by MP-PIC modeling to understand the intrinsic mechanism of solid flow, species mass transfer, and CO 2 photoreaction. The MP-PIC models for solid flow in the FBPR were validated by the bed expansion height and bubble size. The results showed the particle stress of the Lun model, the drag of the Ergun-WenYu (Gidaspow) model, and the coefficient of restitution e = 0.95 with the wall parameters e w = 0.9 and μ w = 0.6 are the best fit to the experimental empirical correlations. The MP-PIC models developed in this work proved to be better than the Eulerian two-fluid modeling in the prediction of the bed expansion height and bubble size. It was also found from the simulation results that the maximum radiation intensity is in the half reactor height area, and the photocatalytic reaction mainly occurred around the inner wall. It showed that the gas velocity and catalyst loading were two crucial operating parameters to control the process. The results reported here can provide guidance for the operation and reactor design of the CO 2 photoreduction process.

show abstract

Section: Validation Of Simulationmentioning

confidence: 99%

Investigation of CO₂ Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation

Tan

Maroto‐Valer

2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The geometry was similar to the study of Q. Zhang et al (2018). Their study set the ICFB model to illustrate the improvement of CFD with the dynamics coefficient of restitution using coupled Eulerian fluid phase-Eulerian solid phase-Lagrangian discrete particle phase (CEEL).…”

Section: Geometry and Initial And Boundary Conditionsmentioning

confidence: 99%

Correlation of restitution coefficient : experiment and computational fluid dynamics simulation

Yurata

View full text Add to dashboard Cite

The computational fluid dynamics with the discrete element method (CFD-DEM) is widely used to predict the hydrodynamics profile of the multiphase flow of fluid-solid or fluidization process. The coefficient of restitution (COR) is one of the most important parameters which is vital for CFD-DEM simulation. This parameter denotes the ratio of the relative velocity after the collision to the relative velocity before the collision. The appropriate value of the coefficient of restitution must receive attention to obtain the realistic collision and hydrodynamics profile. However, this parameter is still selected by trial and error in traditional CFD-DEM due to the lacking of the standard reference for this collision parameter. In this study, the significance of COR in multiphase flow systems was investigated. In addition, the effect of solid materials, impact velocity and temperature on the COR were investigated by the free-fall experiment. The collision behaviour was captured by a high-speed camera and the image analysis was employed to interpret the result. The new correlation was then proposed in terms of impact velocity, elastic modulus, Poisson's ratio, and temperature. The CFD-DEM simulations using a constant value of COR were compared with the CFD-DEM simulation using the correlation of the coefficient of restitution in the various systems such as three interconnected fluidized bed reactors, spouted bed reactor, internal circulating fluidized bed (ICFB) and rotating drum. The obtained results showed the importance of the correlation of dynamics COR and the guideline for further using this collision parameter.

show abstract

Experimental investigation of pressure fluctuation propagation in two orthogonal directions using a clapboard-type internally circulating fluidized bed

Wei

Zhang

et al. 2020

Advanced Powder Technology

View full text Add to dashboard Cite

Impact velocity-dependent restitution coefficient using a coupled Eulerian fluid phase-Eulerian solid phase-Lagrangian discrete particles phase model in gas-monodisperse particles internally circulating fluidized bed

Cited by 7 publications

References 68 publications

Investigation of CO₂ Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation

Investigation of CO₂ Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation

Correlation of restitution coefficient : experiment and computational fluid dynamics simulation

Experimental investigation of pressure fluctuation propagation in two orthogonal directions using a clapboard-type internally circulating fluidized bed

Contact Info

Product

Resources

About

Impact velocity-dependent restitution coefficient using a coupled Eulerian fluid phase-Eulerian solid phase-Lagrangian discrete particles phase model in gas-monodisperse particles internally circulating fluidized bed

Cited by 7 publications

References 68 publications

Investigation of CO2 Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation

Investigation of CO2 Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation

Correlation of restitution coefficient : experiment and computational fluid dynamics simulation

Experimental investigation of pressure fluctuation propagation in two orthogonal directions using a clapboard-type internally circulating fluidized bed

Contact Info

Product

Resources

About

Investigation of CO₂ Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation

Investigation of CO₂ Photoreduction in an Annular Fluidized Bed Photoreactor by MP-PIC Simulation