Influence of binary and ternary particle systems on the spouting stability in a three-dimensional prismatic spouted bed

2019 ◽  
Vol 357 ◽  
pp. 305-312
Author(s):  
S. Pietsch ◽  
P. Kieckhefen ◽  
M. Müller ◽  
M. Schönherr ◽  
F. Kleine Jäger ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Particle Systems ◽  
Spouted Bed

DEM Simulation of the Particle Mixing in Spouted Bed of Three Solids Differing in Diameter

2011 ◽  
Vol 48-49 ◽  
pp. 362-365
Author(s):  
Wei Bing Zhu ◽  
Run Ru Zhu ◽  
Li Chao Xing ◽  
Xiao Bin Zhang
Keyword(s):  
Particle System ◽  
Three Dimensional ◽  
Rolling Friction ◽  
Equation Model ◽  
Particle Systems ◽  
Mixing Process ◽  
Gas Velocity ◽  
Spouted Bed ◽  
Dem Simulation ◽  
Particle Mixing

In this work, the mixing characteristic of ternary diameter particle system in a rectangular spouted bed was carried out three-dimensional discrete element method (DEM). In particular, the standard k- two-equation model and the Beer & Johnson equation were adopted to investigate the influence of turbulence and rolling friction, and Ashton mixing index was adopted to evaluate the dynamic mixing process of the ternary diameter particle systems. The particle velocity profiles, the gas-solid flow patterns, the particles distribution and the effect of gas velocity on mixing are discussed.

scholarly journals CFD Analysis of a Water Vaporization Process in a Three-Dimensional Spouted Bed for Flue Gas Desulfurization

ACS Omega ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 2759-2766
Author(s):  
Jiali Du ◽  
Zhiquan Hui ◽  
Feng Wu ◽  
Yuan Yan ◽  
Kai Yue ◽  
...  
Keyword(s):  
Flue Gas ◽  
Three Dimensional ◽  
Flue Gas Desulfurization ◽  
Cfd Analysis ◽  
Spouted Bed ◽  
Vaporization Process ◽  
Water Vaporization

scholarly journals HIDDEN SCALE IN QUANTUM MECHANICS

2009 ◽  
Vol 24 (27) ◽  
pp. 2203-2211 ◽  
Author(s):  
PULAK RANJAN GIRI
Keyword(s):  
Wave Packet ◽  
Quantum Particle ◽  
Dimensional Space ◽  
Free Particle ◽  
Three Dimensional ◽  
Particle Systems ◽  
Quantum Mechanical ◽  
Scale Invariant ◽  
Mechanical Models ◽  
Three Dimensional Space

We show that the intriguing localization of a free particle wave-packet is possible due to a hidden scale present in the system. Self-adjoint extensions (SAE) is responsible for introducing this scale in quantum mechanical models through the nontrivial boundary conditions. We discuss a couple of classically scale invariant free particle systems to illustrate the issue. In this context it has been shown that a free quantum particle moving on a full line may have localized wave-packet around the origin. As a generalization, it has also been shown that particles moving on a portion of a plane or on a portion of a three-dimensional space can have unusual localized wave-packet.

Hydrodynamics of a spouted bed with an impermeable draft tube for binary particle systems

1999 ◽  
Vol 16 (5) ◽  
pp. 688-693 ◽  
Author(s):  
Hiroshi Nagashima ◽  
Toshifumi Ishikura ◽  
Mitsuharu Ide
Keyword(s):  
Draft Tube ◽  
Particle Systems ◽  
Spouted Bed

A novel method of quantifying the coating progress in a three-dimensional prismatic spouted bed

Particuology ◽  
2019 ◽  
Vol 42 ◽  
pp. 137-145 ◽  
Author(s):  
Swantje Pietsch ◽  
Finn Ole Poppinga ◽  
Stefan Heinrich ◽  
Michael Müller ◽  
Michael Schönherr ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Spouted Bed ◽  
Novel Method

scholarly journals A Comparison of Ansys Fluent and MFiX in Performing CFD-DEM Simulations of a Spouted Bed

Fluids ◽  
2021 ◽  
Vol 6 (11) ◽  
pp. 382
Author(s):  
Filippo Marchelli ◽  
Renzo Di Felice
Keyword(s):  
Lift Force ◽  
Particle Systems ◽  
Fluid Particle ◽  
The Other ◽  
Spouted Bed ◽  
Ansys Fluent ◽  
Drag Model ◽  
Dem Simulations ◽  
Similarities And Differences ◽  
Selection Of

The CFD-DEM methodology is a popular tool for the study of fluid–particle systems, and there are several programs that permit using it. In this study, we employed it to simulate a pseudo-2D spouted bed, comparing the performance of the programs Ansys Fluent and MFiX. The results are analysed and commented on in terms of both accuracy and computational efforts. Despite the similarity of the setup, MFiX seems to perform significantly better. The similarities and differences between the two programs are discussed in detail, offering useful insights to researchers regarding the selection of one over the other, depending on the application. The better suitability of the Di Felice drag model is confirmed for the device, while it is shown that the effect of the Magnus lift force may be more limited than was shown in a previous study.

Three-dimensional MP-PIC simulation of the steam gasification of biomass in a spouted bed gasifier

2020 ◽  
Vol 210 ◽  
pp. 112689 ◽  
Author(s):  
Shiliang Yang ◽  
Feihu Fan ◽  
Yonggang Wei ◽  
Jianhang Hu ◽  
Hua Wang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Steam Gasification ◽  
Spouted Bed ◽  
Pic Simulation

scholarly journals Minimum Spouting Velocity of Binary Particle Systems in a Spouted Bed with a Draft Tube.

1998 ◽  
Vol 24 (2) ◽  
pp. 346-348 ◽  
Author(s):  
TOSHIFUMI ISHIKURA ◽  
HIROSHI NAGASHIMA ◽  
MITSUHARU IDE
Keyword(s):  
Draft Tube ◽  
Particle Systems ◽  
Spouted Bed

Three-dimensional simulation of the effect of draft tube on minimum fluidization velocity in a spouted bed

2012 ◽  
Vol 46 (5) ◽  
pp. 458-463 ◽  
Author(s):  
Sara Moradi ◽  
Zeinab Asadi ◽  
Sadegh Moradi ◽  
Mahmoud Salimi ◽  
Seyed S. Homami ◽  
...  
Keyword(s):  
Draft Tube ◽  
Three Dimensional ◽  
Spouted Bed ◽  
Minimum Fluidization Velocity ◽  
Fluidization Velocity ◽  
Minimum Fluidization ◽  
Dimensional Simulation
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