The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification Process
Cross-flow hollow fiber membranes are commonly applied in humidification/dehumidification. Hollow fiber membranes vibrate and deform under the impinging force of incoming air and the gravity of liquid in the inner tube. In this study, fiber deformation was caused by the pulsating flow of air. With v...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/11/12/918 |
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| author | Zhenxing Li Bo Chen Caihang Liang Nanfeng Li Yunyun Zhao Chuanshuai Dong |
| author_facet | Zhenxing Li Bo Chen Caihang Liang Nanfeng Li Yunyun Zhao Chuanshuai Dong |
| author_sort | Zhenxing Li |
| collection | DOAJ |
| description | Cross-flow hollow fiber membranes are commonly applied in humidification/dehumidification. Hollow fiber membranes vibrate and deform under the impinging force of incoming air and the gravity of liquid in the inner tube. In this study, fiber deformation was caused by the pulsating flow of air. With varied pulsating amplitudes and frequencies, single-fiber deformation was investigated numerically using the fluid–structure interaction technique and verified with experimental data testing with a laser vibrometer. Then, the effect of pulsating amplitude and frequency on heat and mass transfer performance of the hollow fiber membrane was analyzed. The maximum fiber deformation along the airflow direction was far larger than that perpendicular to the flow direction. Compared with the case where the fiber did not vibrate, increasing the pulsation amplitude could strengthen <i>Nu</i> by 14–87%. Flow-induced fiber vibration could raise the heat transfer enhancement index from 13.8% to 80%. The pulsating frequency could also enhance the heat transfer of hollow fiber membranes due to the continuously weakened thermal boundary layer. With the increase in pulsating amplitude or frequency, the <i>Sh</i> number or <i>E</i><sub>m</sub> under vibrating conditions can reach about twice its value under non-vibrating conditions. |
| first_indexed | 2024-03-10T03:35:56Z |
| format | Article |
| id | doaj.art-2b129c77c9754ff1bb392faf59771e2e |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T03:35:56Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-2b129c77c9754ff1bb392faf59771e2e2023-11-23T09:29:54ZengMDPI AGMembranes2077-03752021-11-01111291810.3390/membranes11120918The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification ProcessZhenxing Li0Bo Chen1Caihang Liang2Nanfeng Li3Yunyun Zhao4Chuanshuai Dong5School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaKey Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, ChinaCross-flow hollow fiber membranes are commonly applied in humidification/dehumidification. Hollow fiber membranes vibrate and deform under the impinging force of incoming air and the gravity of liquid in the inner tube. In this study, fiber deformation was caused by the pulsating flow of air. With varied pulsating amplitudes and frequencies, single-fiber deformation was investigated numerically using the fluid–structure interaction technique and verified with experimental data testing with a laser vibrometer. Then, the effect of pulsating amplitude and frequency on heat and mass transfer performance of the hollow fiber membrane was analyzed. The maximum fiber deformation along the airflow direction was far larger than that perpendicular to the flow direction. Compared with the case where the fiber did not vibrate, increasing the pulsation amplitude could strengthen <i>Nu</i> by 14–87%. Flow-induced fiber vibration could raise the heat transfer enhancement index from 13.8% to 80%. The pulsating frequency could also enhance the heat transfer of hollow fiber membranes due to the continuously weakened thermal boundary layer. With the increase in pulsating amplitude or frequency, the <i>Sh</i> number or <i>E</i><sub>m</sub> under vibrating conditions can reach about twice its value under non-vibrating conditions.https://www.mdpi.com/2077-0375/11/12/918flow-induced vibrationpulsating flowfiber deformationtwo-way fluid solid interactionheat and mass transfer |
| spellingShingle | Zhenxing Li Bo Chen Caihang Liang Nanfeng Li Yunyun Zhao Chuanshuai Dong The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification Process Membranes flow-induced vibration pulsating flow fiber deformation two-way fluid solid interaction heat and mass transfer |
| title | The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification Process |
| title_full | The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification Process |
| title_fullStr | The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification Process |
| title_full_unstemmed | The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification Process |
| title_short | The Effect of Flow-Induced Vibration on Heat and Mass Transfer Performance of Hollow Fiber Membranes in the Humidification/Dehumidification Process |
| title_sort | effect of flow induced vibration on heat and mass transfer performance of hollow fiber membranes in the humidification dehumidification process |
| topic | flow-induced vibration pulsating flow fiber deformation two-way fluid solid interaction heat and mass transfer |
| url | https://www.mdpi.com/2077-0375/11/12/918 |
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