Experiments and meso-scale modeling of phase holdups and bubble behavior in gas-liquid-solid mini-fluidized beds

2018 ◽  
Vol 192 ◽  
pp. 725-738 ◽  
Author(s):  
Xiangnan Li ◽  
Mingyan Liu ◽  
Yongli Ma ◽  
Tingting Dong ◽  
Dong Yao
Keyword(s):  
Fluidized Beds ◽  
Bubble Behavior ◽  
Scale Modeling ◽  
Meso Scale

Axial meso-scale modeling of gas-liquid-solid fluidized beds

2019 ◽  
Vol 196 ◽  
pp. 188-201 ◽  
Author(s):  
Yongli Ma ◽  
Mingyan Liu ◽  
Yuan Zhang
Keyword(s):  
Fluidized Beds ◽  
Scale Modeling ◽  
Meso Scale

Axial meso-scale modeling of gas-liquid-solid circulating fluidized beds

2019 ◽  
Vol 208 ◽  
pp. 115139
Author(s):  
Yongli Ma ◽  
Mingyan Liu ◽  
Xiuhong Zhou ◽  
Areej Javed
Keyword(s):  
Fluidized Beds ◽  
Circulating Fluidized Beds ◽  
Scale Modeling ◽  
Meso Scale

A novel synergistic multi-scale modeling framework to predict micro- and meso-scale damage behaviors of 2D triaxially braided composite

2021 ◽  
pp. 105678952110339
Author(s):  
Hongyong Jiang ◽  
Yiru Ren ◽  
Qiduo Jin
Keyword(s):  
Compressive Load ◽  
Scale Model ◽  
Modeling Framework ◽  
Braided Composite ◽  
Multi Scale ◽  
Scale Modeling ◽  
Bridge Model ◽  
Multi Scale Modeling ◽  
Transverse Damage ◽  
Meso Scale

A novel synergistic multi-scale modeling framework with a coupling of micro- and meso-scale is proposed to predict damage behaviors of 2D-triaxially braided composite (2DTBC). Based on the Bridge model, the internal stress and micro damage of constituent materials are respectively coupled with the stress and damage of tow. The initial effective elastic properties of tow (IEEP) used as the predefined data are estimated by micro-mechanics models. Due to in-situ effects, stress concentration factor (SCF) is considered in the micro matrix, exhibiting progressive damage accumulation. Comparisons of IEEP and strengths between the Bridge and Chamis’ theory are conducted to validate the values of IEEP and SCF. Based on the representative volume element (RVE), the macro properties and damage modes of 2DTBC are predicted to be consistent with available experiments and meso-scale simulation. Both axial and transverse damage mechanisms of 2DTBC under tensile or compressive load are revealed. Micro fiber and matrix damage accumulations have significant effects on the meso-scale axial and transverse damage of tows due to multi-scale coupling effects. Different from existing meso-/multi-scale models, the proposed multi-scale model can capture a crucial phenomenon that the transverse damage of tow is vulnerable to micro fiber fracture. The proposed multi-scale framework provides a robust tool for future systematic studies on constituent materials level to larger-scale aeronautical materials.

Discrete Bubble Model for Prediction of Bubble Behavior in 3D Fluidized Beds

2012 ◽  
Vol 35 (5) ◽  
pp. 929-936 ◽  
Author(s):  
S. Movahedirad ◽  
M. Ghafari ◽  
A. M. Dehkordi
Keyword(s):  
Fluidized Beds ◽  
Bubble Behavior
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