scholarly journals Modification of kinetic theory of granular flow for frictional spheres, Part I: Two-fluid model derivation and numerical implementation

2016 ◽  
Vol 152 ◽  
pp. 767-782 ◽  
Author(s):  
L. (Lei) Yang ◽  
J.T. (Johan) Padding ◽  
J.A.M. (Hans) Kuipers
Keyword(s):  
Kinetic Theory ◽  
Granular Flow ◽  
Fluid Model ◽  
Numerical Implementation ◽  
Model Derivation ◽  
Two Fluid Model ◽  
Two Fluid

Numerical Simulation of Effect of Internals on Slugging Fluidization and Analysis of Nonuniformity Index

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Xiaoling Wang ◽  
Liang Yu ◽  
Jun Wang
Keyword(s):  
Experimental Data ◽  
Granular Flow ◽  
Fluidized Beds ◽  
Fluid Model ◽  
Two Fluid Model ◽  
Reasonable Prediction ◽  
Two Fluid ◽  
Radial Nonuniformity ◽  
Flow Nonuniformity

Abstract The Two-Fluid Model (TFM) using the Kinetic Theory of Granular Flow (KTGF) was applied to simulate 3-D dense fluidized beds with different complex internals. The slugging fluidization was found in the simulated results. When the internals were placed into the reactors, the simulated results showed that the slugs were broken up and bubbling fluidization was formed instead of slugging fluidization. The formation, growth, size, and shape of bubbles were validated to ensure a reasonable prediction. Furthermore, the simulated pressure drop was compared with the corresponding experimental data from the dense fluidized beds with different complex internals, and good agreements were observed. Finally, the flow nonuniformity in the dense fluidized beds was evaluated by a developed method. This method extended Radial Nonuniformity Index (RNI) to Face Nonuniformity Index (FNI) and Volume Nonuniformity Index (VNI). From the calculated FNI and VNI, the fluidization quality of the fluidized beds was quantitatively judged as follows: No.3 > No.1> No.2 > No.4 > Without Internal.

Generalized Boltzmann kinetic theory for EMMS-based two-fluid model

2016 ◽  
Vol 156 ◽  
pp. 44-55 ◽  
Author(s):  
Bidan Zhao ◽  
Shuyue Li ◽  
Junwu Wang
Keyword(s):  
Kinetic Theory ◽  
Fluid Model ◽  
Two Fluid Model ◽  
Two Fluid

Numerical Simulation of the Gas-Solid Flow in a Mini-Riser Reactor

2011 ◽  
Vol 396-398 ◽  
pp. 356-360
Author(s):  
Qun Shuai ◽  
Gen Lin Niu ◽  
Hui Zhao ◽  
Qiang Li
Keyword(s):  
Numerical Simulation ◽  
Kinetic Theory ◽  
Solid Phase ◽  
Fluid Model ◽  
Two Phase ◽  
Operational Conditions ◽  
Riser Reactor ◽  
Two Fluid Model ◽  
Two Fluid ◽  
As Solid Phase

The implementation of the kinetic theory for granular flows added strength to the two-phase flow model in the mini-riser. This model uses simulating and calculating commercial software of Fluent to simulate the mini-riser with 0.012m ID and 3m height. Euler-Euler two fluid model was adopted in two dimensional numerical simulation, according to kinetic theory，the solid stress was calculated based on granular temperature and granular viscosity obtained through simulation which could be used to describe the collision between particles. Simulation results, such as solid phase fraction and solid phase velocity, under different operational conditions basically agree well with the experimental measurement.

Two fluid model using kinetic theory for modeling of one-step hydrogen production gasifier

AIChE Journal ◽  
2008 ◽  
Vol 54 (11) ◽  
pp. 2833-2851 ◽  
Author(s):  
Liang Yu ◽  
Jing Lu ◽  
Xiangping Zhang ◽  
Suojiang Zhang ◽  
Xiaoling Wang
Keyword(s):  
Hydrogen Production ◽  
Kinetic Theory ◽  
Fluid Model ◽  
One Step ◽  
Two Fluid Model ◽  
Two Fluid

scholarly journals Natural modes of the two-fluid model of two-phase flow

2021 ◽  
Vol 33 (3) ◽  
pp. 033324
Author(s):  
Alejandro Clausse ◽  
Martín López de Bertodano
Keyword(s):  
Two Phase Flow ◽  
Fluid Model ◽  
Phase Flow ◽  
Two Phase ◽  
Natural Modes ◽  
Two Fluid Model ◽  
Two Fluid

Self-consistent hydrodynamic two-fluid model of vortex plasma

2021 ◽  
Vol 33 (3) ◽  
pp. 037116
Author(s):  
Victor L. Mironov
Keyword(s):  
Fluid Model ◽  
Self Consistent ◽  
Two Fluid Model ◽  
Two Fluid
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