Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a Pipe
Particle settlement and pressure drop in a gas–solid two-phase flow in a pipe with a circular cross-section are studied at mixture inlet velocities (<i>V</i>) ranging from 1 m/s to 30 m/s, particle volume concentrations (<i>α<sub>s</sub></i>) ranging from 1% to 20...
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MDPI AG
2022-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/3/1623 |
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| author | Wenqian Lin Liang Li Yelong Wang |
| author_facet | Wenqian Lin Liang Li Yelong Wang |
| author_sort | Wenqian Lin |
| collection | DOAJ |
| description | Particle settlement and pressure drop in a gas–solid two-phase flow in a pipe with a circular cross-section are studied at mixture inlet velocities (<i>V</i>) ranging from 1 m/s to 30 m/s, particle volume concentrations (<i>α<sub>s</sub></i>) ranging from 1% to 20%, particle mass flows (<i>m<sub>s</sub></i>) ranging from 5 t/h to 25 t/h, and particle diameters (<i>d<sub>p</sub></i>) ranging from 50 μm to 1000 μm. The momentum equations are based on a two-fluid model and are solved numerically. Some results are validated through comparison with the experimental results. The results showed that the gas and particle velocity distributions are asymmetrical around the center of the pipe and that the maximum velocity point moves up. The distance between the radial position of the maximum velocity and the center line for the gas is larger than that for the particles. The particle motion lags behind that of the gas flow. The particle settlement phenomenon is more serious, and the particle distribution on the cross-section is more inhomogeneous as the <i>V</i>, <i>α<sub>s</sub></i>, and <i>m<sub>s</sub></i> decrease and as <i>d<sub>p</sub></i> increases. It can be divided into three areas according to the pressure changes along the flow direction, and the distinction between the three areas is more obvious as the <i>α<sub>s</sub></i> increases. The pressure drop per unit length increases as the <i>V</i>, <i>α<sub>s</sub></i> and <i>m<sub>s</sub></i> increases and as <i>d<sub>p</sub></i> decreases, Finally, the expressions of the settlement index and pressure drop per unit length as functions of <i>V</i>, <i>α<sub>s</sub></i>, <i>m<sub>s,</sub></i> and <i>d<sub>p</sub></i> are derived based on the numerical data. |
| first_indexed | 2024-03-10T00:10:33Z |
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| language | English |
| last_indexed | 2024-03-10T00:10:33Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-d8504a17ac6849c78e512b5efbc85a442023-11-23T16:00:40ZengMDPI AGApplied Sciences2076-34172022-02-01123162310.3390/app12031623Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a PipeWenqian Lin0Liang Li1Yelong Wang2School of Media and Design, Hangzhou Dianzi University, Hangzhou 310018, ChinaState Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, ChinaParticle settlement and pressure drop in a gas–solid two-phase flow in a pipe with a circular cross-section are studied at mixture inlet velocities (<i>V</i>) ranging from 1 m/s to 30 m/s, particle volume concentrations (<i>α<sub>s</sub></i>) ranging from 1% to 20%, particle mass flows (<i>m<sub>s</sub></i>) ranging from 5 t/h to 25 t/h, and particle diameters (<i>d<sub>p</sub></i>) ranging from 50 μm to 1000 μm. The momentum equations are based on a two-fluid model and are solved numerically. Some results are validated through comparison with the experimental results. The results showed that the gas and particle velocity distributions are asymmetrical around the center of the pipe and that the maximum velocity point moves up. The distance between the radial position of the maximum velocity and the center line for the gas is larger than that for the particles. The particle motion lags behind that of the gas flow. The particle settlement phenomenon is more serious, and the particle distribution on the cross-section is more inhomogeneous as the <i>V</i>, <i>α<sub>s</sub></i>, and <i>m<sub>s</sub></i> decrease and as <i>d<sub>p</sub></i> increases. It can be divided into three areas according to the pressure changes along the flow direction, and the distinction between the three areas is more obvious as the <i>α<sub>s</sub></i> increases. The pressure drop per unit length increases as the <i>V</i>, <i>α<sub>s</sub></i> and <i>m<sub>s</sub></i> increases and as <i>d<sub>p</sub></i> decreases, Finally, the expressions of the settlement index and pressure drop per unit length as functions of <i>V</i>, <i>α<sub>s</sub></i>, <i>m<sub>s,</sub></i> and <i>d<sub>p</sub></i> are derived based on the numerical data.https://www.mdpi.com/2076-3417/12/3/1623gas–solid two-phase flowpipe with circular cross-sectionsettlementpressure dropnumerical simulation |
| spellingShingle | Wenqian Lin Liang Li Yelong Wang Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a Pipe Applied Sciences gas–solid two-phase flow pipe with circular cross-section settlement pressure drop numerical simulation |
| title | Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a Pipe |
| title_full | Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a Pipe |
| title_fullStr | Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a Pipe |
| title_full_unstemmed | Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a Pipe |
| title_short | Pressure Drop and Particle Settlement of Gas–Solid Two-Phase Flow in a Pipe |
| title_sort | pressure drop and particle settlement of gas solid two phase flow in a pipe |
| topic | gas–solid two-phase flow pipe with circular cross-section settlement pressure drop numerical simulation |
| url | https://www.mdpi.com/2076-3417/12/3/1623 |
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