Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock Tubes
Microshock tubes are always used to induce shock waves and supersonic flows in aerospace and medical engineering fields. A needle-free drug delivery device including a microshock tube and an expanded nozzle is used for delivering solid drug powders through the skin surface without any injectors or p...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6628672 |
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| _version_ | 1832566146366177280 |
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| author | Guang Zhang Wei Wei Wang Xiang Hui Su Xiao Jun Li Wen Hao Shen Zhe Lin |
| author_facet | Guang Zhang Wei Wei Wang Xiang Hui Su Xiao Jun Li Wen Hao Shen Zhe Lin |
| author_sort | Guang Zhang |
| collection | DOAJ |
| description | Microshock tubes are always used to induce shock waves and supersonic flows in aerospace and medical engineering fields. A needle-free drug delivery device including a microshock tube and an expanded nozzle is used for delivering solid drug powders through the skin surface without any injectors or pain. Therefore, to improve the performance of needle-free drug delivery devices, it is significantly important to investigate shock waves and particle-gas flows induced by microshock tubes. Even though shock waves and multiphase flows discharged from microshock tubes have been studied for several decades, the characteristics of unsteady particle-gas flows are not well known to date. In the present studies, three microshock tube models were used for numerical simulations. One microshock tube model with closed end was used to observe the reflected shock wave and flow characteristics behind it. The other two models are designed with a supersonic nozzle and a sonic nozzle at the exit of the driven section, respectively, to investigate particle-gas flows induced by different nozzles. Discrete phase method (DPM) was used to simulate unsteady particle-gas flows and the discrete random walk model was chosen to record the unsteady particle tracking. Numerical results were obtained for comparison with those from experimental pressure measurement and particle visualization. Shock wave propagation was observed to agree well with experimental results from numerical simulations. Particles were accelerated at the exit of microshock tube due to the reservoir pressure induced by reflected shock wave. Both sonic and supersonic nozzles were underexpanded at the end of microshock tubes. Particle velocity was calculated to be smaller than gas velocity, which results from larger drag of injected particles. |
| format | Article |
| id | doaj-art-8dffeb466b2840e491acfdc1a8602822 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-8dffeb466b2840e491acfdc1a86028222025-02-03T01:05:05ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66286726628672Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock TubesGuang Zhang0Wei Wei Wang1Xiang Hui Su2Xiao Jun Li3Wen Hao Shen4Zhe Lin5State-Province Joint Engineering Lab of Fluid Transmission System Technology, Zhejiang Sci-Tech University, Hangzhou 310018, ChinaState-Province Joint Engineering Lab of Fluid Transmission System Technology, Zhejiang Sci-Tech University, Hangzhou 310018, ChinaState-Province Joint Engineering Lab of Fluid Transmission System Technology, Zhejiang Sci-Tech University, Hangzhou 310018, ChinaState-Province Joint Engineering Lab of Fluid Transmission System Technology, Zhejiang Sci-Tech University, Hangzhou 310018, ChinaDepartment of Oncology, Taizhou People’s Hospital, Medical School of Nantong University, Taizhou, Jiangsu, ChinaState-Province Joint Engineering Lab of Fluid Transmission System Technology, Zhejiang Sci-Tech University, Hangzhou 310018, ChinaMicroshock tubes are always used to induce shock waves and supersonic flows in aerospace and medical engineering fields. A needle-free drug delivery device including a microshock tube and an expanded nozzle is used for delivering solid drug powders through the skin surface without any injectors or pain. Therefore, to improve the performance of needle-free drug delivery devices, it is significantly important to investigate shock waves and particle-gas flows induced by microshock tubes. Even though shock waves and multiphase flows discharged from microshock tubes have been studied for several decades, the characteristics of unsteady particle-gas flows are not well known to date. In the present studies, three microshock tube models were used for numerical simulations. One microshock tube model with closed end was used to observe the reflected shock wave and flow characteristics behind it. The other two models are designed with a supersonic nozzle and a sonic nozzle at the exit of the driven section, respectively, to investigate particle-gas flows induced by different nozzles. Discrete phase method (DPM) was used to simulate unsteady particle-gas flows and the discrete random walk model was chosen to record the unsteady particle tracking. Numerical results were obtained for comparison with those from experimental pressure measurement and particle visualization. Shock wave propagation was observed to agree well with experimental results from numerical simulations. Particles were accelerated at the exit of microshock tube due to the reservoir pressure induced by reflected shock wave. Both sonic and supersonic nozzles were underexpanded at the end of microshock tubes. Particle velocity was calculated to be smaller than gas velocity, which results from larger drag of injected particles.http://dx.doi.org/10.1155/2021/6628672 |
| spellingShingle | Guang Zhang Wei Wei Wang Xiang Hui Su Xiao Jun Li Wen Hao Shen Zhe Lin Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock Tubes Shock and Vibration |
| title | Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock Tubes |
| title_full | Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock Tubes |
| title_fullStr | Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock Tubes |
| title_full_unstemmed | Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock Tubes |
| title_short | Numerical Studies of Particle-Gas Two-Phase Flowing through Microshock Tubes |
| title_sort | numerical studies of particle gas two phase flowing through microshock tubes |
| url | http://dx.doi.org/10.1155/2021/6628672 |
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