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Numerical Simulation on the Flow Pattern of a Gas-Liquid Two-Phase Swirl Flow
Yongchao Rao1,2, Zehui Liu1,2, Shuli Wang3
1Jiangsu Key Laboratory of Oil-Gas Storage and Transportation Technology, Changzhou University, Changzhou, Jiangsu 213164, China.
ACS Omega
|January 31, 2022
Summary
Swirl flow enhances gas-liquid heat and mass transfer, promoting natural gas hydrate formation and ensuring slurry safety. This study maps flow patterns, revealing four types and predicting boundaries for swirl bubble and annular flows.
Area of Science:
- Fluid dynamics
- Chemical engineering
- Natural gas hydrates
Background:
- Gas-liquid swirl flow enhances heat and mass transfer.
- Swirl flow can promote gas hydrate formation and ensure slurry safety.
Purpose of the Study:
- Investigate the flow pattern and conversion law of gas-liquid swirl flow with a twist tape.
- Develop a flow pattern map for gas-liquid swirl flow.
Main Methods:
- Numerical simulation using the Reynolds stress model and the level set model.
- Investigation of gas-liquid-phase velocity influence on flow patterns.
- Comparison with the Mandhane flow pattern map.
Main Results:
- Identified four distinct flow patterns: swirl-stratified, swirl bubble, swirl slug, and swirl annular flow.
- Observed that two-phase slip velocity affects gas form and swirl attenuation alters flow patterns along the pipe.
- Accomplished a flow pattern map for gas-liquid swirl flow.
Conclusions:
- The study provides a comprehensive understanding of gas-liquid swirl flow patterns.
- The developed flow pattern map aids in predicting and controlling gas hydrate processes.
- The findings contribute to the safe and efficient handling of natural gas hydrate slurries.
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