CFD Modeling of the Fast Pyrolysis of Coal in Cold Flow Fluidized Bed

2011 ◽  
Vol 396-398 ◽  
pp. 209-212
Author(s):  
An Ning Zhou ◽  
Tie Shuan Zhang ◽  
Xiu Bin Ren ◽  
Li Zhen Zheng
Keyword(s):  
Fluidized Bed ◽  
Fluidized Beds ◽  
Two Phase Flow ◽  
Fast Pyrolysis ◽  
Cfd Modeling ◽  
Phase Flow ◽  
Two Phase ◽  
Cold Flow ◽  
Solid Phases ◽  
2D Model

Abstract. Gas-solid fluidized beds are widely applied in many industries as reactors or heat/mass transferring units because of their good heterogeneous mixing behaviors and large transferring area between the gas and solid phases. In this study, based on the Eulerian-Eulerian approach, 2D model of gas-solid flow field in fluidized bed is simulated, and the drag force models of Gidaspow and Syamlal-O’Brien have been used to simulate and analyze the two-phase flow for exploring mechanism and interaction laws of two-phase flow.

scholarly journals CFD modeling of liquid film reversal of two-phase flow in vertical pipes

2019 ◽  
Vol 9 (4) ◽  
pp. 3039-3070
Author(s):  
Mohamed M. Hussein ◽  
A. Al-Sarkhi ◽  
H. M. Badr ◽  
M. A. Habib
Keyword(s):  
Liquid Film ◽  
Two Phase Flow ◽  
Cfd Modeling ◽  
Phase Flow ◽  
Two Phase

The simulation and experimental validation on gas-solid two phase flow in the riser of a dense fluidized bed

2009 ◽  
Vol 18 (2) ◽  
pp. 137-141 ◽  
Author(s):  
Xue-yao Wang ◽  
Fan Jiang ◽  
Xiang Xu ◽  
Sheng-dian Wang ◽  
Bao-guo Fan ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Experimental Validation ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

Computational Fluid Dynamics Modeling of Flow Boiling in Microchannels With Nonuniform Heat Flux

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Daniel Lorenzini ◽  
Yogendra K. Joshi
Keyword(s):  
Fluid Dynamics ◽  
Heat Flux ◽  
Computational Fluid Dynamics ◽  
Phase Change ◽  
Two Phase Flow ◽  
Flow Boiling ◽  
Cfd Modeling ◽  
Temperature Phase ◽  
Phase Flow ◽  
Two Phase

The computational fluid dynamics (CFD) modeling of boiling phenomena has remained a challenge due to numerical limitations for accurately simulating the two-phase flow and phase-change processes. In the present investigation, a CFD approach for such analysis is described using a three-dimensional (3D) volume of fluid (VOF) model coupled with a phase-change model accounting for the interfacial mass and energy transfer. This type of modeling allows the transient analysis of flow boiling mechanisms, while providing the ability to visualize in detail temperature, phase, and pressure distributions for microscale applications with affordable computational resources. Results for a plain microchannel are validated against benchmark correlations for heat transfer (HT) coefficients and pressure drop as a function of the heat flux and mass flux. Furthermore, the model is used for the assessment of two-phase cooling in microelectronics under a realistic scenario with nonuniform heat fluxes at localized regions of a silicon microchannel, relevant to the cooling layer of 3D integrated circuit (IC) architectures. Results indicate the strong effect of two-phase flow regime evolution and vapor accumulation on HT. The effects of reduced saturation pressure, subcooling, and flow arrangement are explored in order to provide insight about the underlying physics and cooling performance.

scholarly journals Analytical method of softness abrasive two-phase flow field based on 2D model of LSM

2012 ◽  
Vol 61 (1) ◽  
pp. 010205
Author(s):  
Ji Shi-Ming ◽  
Weng Xiao-Xing ◽  
Tan Da-Peng
Keyword(s):  
Flow Field ◽  
Analytical Method ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
2D Model
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