Particle-resolved simulation of packed beds by non-body conforming locally refined orthogonal hexahedral mesh

doi:10.1016/j.cjche.2019.01.033

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (11): 2635-2642.DOI: 10.1016/j.cjche.2019.01.033

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

Particle-resolved simulation of packed beds by non-body conforming locally refined orthogonal hexahedral mesh

Bing Yuan^1,2, Junbo Xu², Zaisha Mao², Yongqiang Zhang³, Chao Yang^1,2

1 College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
2 CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China

收稿日期:2018-11-06 修回日期:2018-12-06 出版日期:2019-11-28 发布日期:2020-01-19
通讯作者: Junbo Xu, Chao Yang
基金资助:
Supported by the National Key Research and Development Program (2016YFB0301702), National Natural Science Foundation of China (21490584, 21878298, 91534105), Major National Scientific Instrument and Equipment Development Project (21427814), Key Research Program of Frontier Sciences of CAS (QYZDJ-SSW-JSC030) and Jiangsu National Synergetic Innovation Center for Advanced Materials.

Particle-resolved simulation of packed beds by non-body conforming locally refined orthogonal hexahedral mesh

Bing Yuan^1,2, Junbo Xu², Zaisha Mao², Yongqiang Zhang³, Chao Yang^1,2

1 College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
2 CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 SINOPEC Research Institute of Petroleum Processing, Beijing 100083, China

Received:2018-11-06 Revised:2018-12-06 Online:2019-11-28 Published:2020-01-19
Contact: Junbo Xu, Chao Yang
Supported by:
Supported by the National Key Research and Development Program (2016YFB0301702), National Natural Science Foundation of China (21490584, 21878298, 91534105), Major National Scientific Instrument and Equipment Development Project (21427814), Key Research Program of Frontier Sciences of CAS (QYZDJ-SSW-JSC030) and Jiangsu National Synergetic Innovation Center for Advanced Materials.

摘要/Abstract

摘要： The traditional fixed-bed reactor design is usually not suitable for the low tube-to-particle diameter ratios (N=D/d < 8) where the local phenomena of channeling near the wall and backflow in the bed are dominant. The recent "solid particle" meshing method is too complicated for mesh generation, especially for non-spherical particles in large random packed beds, which seriously hinders its development. In this work, a novel high-fidelity mesh model is proposed for simulation of fixed bed reactors by combining the immersed boundary and adaptive meshing methods. This method is suitable for different shapes of particles, which ingeniously avoids handling the complex "contact point" problem. Several packed beds with two different shapes of particles are investigated with this model, and the local flow in the bed is simulated without geometrical simplification. The predicted pressure drop across the fixed bed and heat transfer of the single particle are in good agreement with the corresponding empirical relations. Compared with spherical particles, the packed bed packing with pentaphyllous particles has lower pressure drop and better heat/mass transfer performance, and it shows that this method can be used for the screening of particle shapes in a fixed bed.

关键词: CFD, Packed bed, Model, Simulation, Transport

Abstract: The traditional fixed-bed reactor design is usually not suitable for the low tube-to-particle diameter ratios (N=D/d < 8) where the local phenomena of channeling near the wall and backflow in the bed are dominant. The recent "solid particle" meshing method is too complicated for mesh generation, especially for non-spherical particles in large random packed beds, which seriously hinders its development. In this work, a novel high-fidelity mesh model is proposed for simulation of fixed bed reactors by combining the immersed boundary and adaptive meshing methods. This method is suitable for different shapes of particles, which ingeniously avoids handling the complex "contact point" problem. Several packed beds with two different shapes of particles are investigated with this model, and the local flow in the bed is simulated without geometrical simplification. The predicted pressure drop across the fixed bed and heat transfer of the single particle are in good agreement with the corresponding empirical relations. Compared with spherical particles, the packed bed packing with pentaphyllous particles has lower pressure drop and better heat/mass transfer performance, and it shows that this method can be used for the screening of particle shapes in a fixed bed.

Key words: CFD, Packed bed, Model, Simulation, Transport

Bing Yuan, Junbo Xu, Zaisha Mao, Yongqiang Zhang, Chao Yang. Particle-resolved simulation of packed beds by non-body conforming locally refined orthogonal hexahedral mesh[J]. 中国化学工程学报, 2019, 27(11): 2635-2642.

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Particle-resolved simulation of packed beds by non-body conforming locally refined orthogonal hexahedral mesh

Particle-resolved simulation of packed beds by non-body conforming locally refined orthogonal hexahedral mesh

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