LAPSE:2020.0077
Published Article
LAPSE:2020.0077
CFD Study of Gas Holdup and Frictional Pressure Drop of Vertical Riser Inside IC Reactor
Sheng Wang, He Dong, Zhongfeng Geng, Xiuqin Dong
January 19, 2020
The internal circulation system in Internal Circulation (IC) reactor plays an important role in increasing volumetric loading rate and promoting the mixing between sludge and wastewater. In order to design the internal circulation system, the flow behaviors of gas-liquid inside vertical riser should be studied in detail. In the present study, the Multiple Flow Regimes model is adopted to capture the phase interface for different flow conditions. The flow patterns, internal circulation flow rate, gas holdup, and frictional pressure drop of vertical riser are investigated. The results show that the bubble flow inside a vertical riser is in a stable flow condition. There exists a maximum value for internal circulation flow rate with the increasing superficial gas velocity. The parameters of Martinelli models for gas holdup and frictional pressure drop are improved based on Computational Fluid Dynamics (CFD) results. The deviations between the calculated gas holdup and frictional pressure drop by improved model and experimental value are reduced to 14% and 13.2%, respectively. The improved gas holdup and frictional pressure drop model can be used for the optimal design of internal circulation system.
Keywords
flow pattern, frictional pressure drop, gas holdup, multiple flow regimes model, vertical riser
Suggested Citation
Wang S, Dong H, Geng Z, Dong X. CFD Study of Gas Holdup and Frictional Pressure Drop of Vertical Riser Inside IC Reactor. (2020). LAPSE:2020.0077
Author Affiliations
Wang S: Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China; R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and E
Dong H: Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China; R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and E
Geng Z: Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China; R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and E [ORCID]
Dong X: Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin 300072, China; R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and E
Journal Name
Processes
Volume
7
Issue
12
Article Number
E936
Year
2019
Publication Date
2019-12-09
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7120936, Publication Type: Journal Article
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LAPSE:2020.0077
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doi:10.3390/pr7120936
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Jan 19, 2020
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Jan 19, 2020
 
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Original Submitter
Calvin Tsay
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