Multi-scale CFD simulation of gas–solid flow in MIP reactors with a structure-dependent drag model

2007 ◽  
Vol 62 (18-20) ◽  
pp. 5487-5494 ◽  
Author(s):  
Bona Lu ◽  
Wei Wang ◽  
Jinghai Li ◽  
Xianghui Wang ◽  
Shiqiu Gao ◽  
...  
Keyword(s):  
Cfd Simulation ◽  
Solid Flow ◽  
Drag Model ◽  
Multi Scale

Investigation into the elutriation of fines from binary mixtures via CFD simulation with a multi-scale drag model

2018 ◽  
Vol 339 ◽  
pp. 633-640 ◽  
Author(s):  
Shuai Wang ◽  
Bang Hu ◽  
Siyu Liu ◽  
Weijie Yin ◽  
Kai Zhang
Keyword(s):  
Binary Mixtures ◽  
Cfd Simulation ◽  
Drag Model ◽  
Multi Scale

2D CFD Simulation of Hydrodynamics of the Dense Zone of a 65t/h High-Low Bed CFB

2012 ◽  
Vol 614-615 ◽  
pp. 596-599
Author(s):  
Qing Wang ◽  
Jian Bo Xiao ◽  
Hong Peng Liu
Keyword(s):  
Size Distribution ◽  
Cfd Simulation ◽  
Volume Fraction ◽  
Flow Behavior ◽  
Solid Volume Fraction ◽  
Multiphase Model ◽  
Interphase Interaction ◽  
Solid Flow ◽  
Drag Model ◽  
Dense Zone

Gas-solid flow behavior of the bottom zone of a 65t/h High-low bed CFB was simulated using the commercial computational fluid dynamics (CFD) software package Fluent. The Eulerian-Eulerian model (EEM) based on the kinetic theory of granular flow (KTGF) was adopted. This approach treated each phase as continuous separately. The link between the gas and solid phases was through drag model and turbulence model. While the turbulence was simulated by the standard k-ε and mixture multiphase model, the Gidaspow drag model was used to model the interphase interaction. Four phases were set to achieve size distribution in the EEM. Gas and solid flow profiles are obtained for solid velocity, solid volume fraction, pressure, and size distribution. The results show that EEM can predict preferably the internal circulation process of the dense zone high-low bed CFB.

Investigation of turbulent gas-solid flow multi-scale dynamic in circulating fluidized bed riser

2020 ◽  
Author(s):  
Ricardo Nava de Sousa ◽  
Julia Volkmann ◽  
Cristian Ricardo Schwatz ◽  
Christine Boos ◽  
Rodrigo Koerich Decker ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Solid Flow ◽  
Multi Scale

scholarly journals CFD Simulation of Dilute Gas-Solid Flow in 90<sup>o</sup>Square Bend

2011 ◽  
Vol 03 (03) ◽  
pp. 246-252 ◽  
Author(s):  
T. A. Mikhail ◽  
Walid A. Aissa ◽  
S. A. Hassanein ◽  
O. Hamdy
Keyword(s):  
Cfd Simulation ◽  
Solid Flow ◽  
Dilute Gas

Gas-Solid Flow in an Airlift Loop Reactor: A Cluster Structure-Dependent Drag Model

2017 ◽  
Vol 40 (3) ◽  
pp. 514-521
Author(s):  
Juhui Chen ◽  
Cheng Meng ◽  
Shuai Wang ◽  
Xiaojiao Song
Keyword(s):  
Cluster Structure ◽  
Solid Flow ◽  
Loop Reactor ◽  
Drag Model ◽  
Airlift Loop Reactor ◽  
Airlift Loop

Experiment and multiphase CFD simulation of gas-solid flow in a CFB reactor at various operating conditions: Assessing the performance of 2D and 3D simulations

2020 ◽  
Vol 37 (12) ◽  
pp. 2094-2103
Author(s):  
Mukesh Upadhyay ◽  
Myung Won Seo ◽  
Parlikkad Rajan Naren ◽  
Jong-Ho Park ◽  
Thanh Dang Binh Nguyen ◽  
...  
Keyword(s):  
Cfd Simulation ◽  
Operating Conditions ◽  
Solid Flow ◽  
3D Simulations ◽  
Multiphase Cfd ◽  
2D And 3D

Simulation of gas-solid flow behavior in downers using a new drag model based on the spatial superposition assumption

2020 ◽  
Vol 374 ◽  
pp. 304-313
Author(s):  
Xueer Pan ◽  
Wenhao Lian ◽  
Jingxuan Yang ◽  
Zhonglin Zhang ◽  
Xiaogang Hao ◽  
...  
Keyword(s):  
Flow Behavior ◽  
Solid Flow ◽  
Drag Model ◽  
Model Based

scholarly journals Multi-Scale CFD Modeling of Plate Heat Exchangers Including Offset-Strip Fins and Dimple-Type Turbulators for Automotive Applications

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2965 ◽  
Author(s):  
Augusto Della Torre ◽  
Gianluca Montenegro ◽  
Angelo Onorati ◽  
Sumit Khadilkar ◽  
Roberto Icarelli
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Heat Exchangers ◽  
Internal Combustion Engines ◽  
Cfd Simulation ◽  
Full Scale ◽  
Operating Conditions ◽  
Plate Heat ◽  
Multi Scale ◽  
Macro Scale

Plate heat exchangers including offset-strip fins or dimple-type turbulators have a wide application in the automotive field as oil coolers for internal combustion engines and transmissions. Their optimization is a complex task since it requires targeting different objectives: High compactness, low pressure drop and high heat-transfer efficiency. In this context, the availability of accurate Computational Fluid Dynamics (CFD) simulation models plays an important role during the design phase. In this work, the development of a computational framework for the CFD simulation of compact oil-to-liquid heat exchangers, including offset-strip fins and dimples, is presented. The paper addresses the modeling problem at different scales, ranging from the characteristic size of the turbulator geometry (typically µm–mm) to the full scale of the overall device (typically cm–dm). The simulation framework is based on multi-scale concept, which applies: (a) Detailed simulations for the characterization of the micro-scale properties of the turbulator, (b) an upscaling approach to derive suitable macro-scale models for the turbulators and (c) full-scale simulations of the entire cooler, including the porous models derived for the smaller scales. The model is validated comparing with experimental data under different operating conditions. Then, it is adopted to investigate the details of the fluid dynamics and heat-transfer process, providing guidelines for the optimization of the device.

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