Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock Wave
The initial moving mechanism of densely packed particles driven by shock waves is unclear but vital for the next accurate calculation of the problem. Here, the initial motion details are investigated experimentally and numerically. We found that before particles show notable motion, shock waves comp...
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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/10.1155/2021/8867615 |
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| _version_ | 1832567485410312192 |
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| author | Hua Lv Zhongqi Wang Yunming Zhang Jianping Li |
| author_facet | Hua Lv Zhongqi Wang Yunming Zhang Jianping Li |
| author_sort | Hua Lv |
| collection | DOAJ |
| description | The initial moving mechanism of densely packed particles driven by shock waves is unclear but vital for the next accurate calculation of the problem. Here, the initial motion details are investigated experimentally and numerically. We found that before particles show notable motion, shock waves complete reflection and transmission, and stress waves propagate downstream on particle skeleton. Due to the particle stress wave, particles successively accelerate and obtain an axial velocity of 6–8 m/s. Then, the blocked gas pushes the upstream particles integrally to move downstream, while the gas flow in the pores drags the downstream particles to separate dramatically and accelerate to the velocity of 60–70 m/s. This gas push-drag dual mechanism transforms densely packed particles into a dense gas-particle cloud, which behaves as the expansion phenomena of the dense particles. |
| format | Article |
| id | doaj-art-e90f4e3b0d684c9da8c14bf5325478ea |
| 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-e90f4e3b0d684c9da8c14bf5325478ea2025-02-03T01:01:25ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/88676158867615Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock WaveHua Lv0Zhongqi Wang1Yunming Zhang2Jianping Li3National Engineering Laboratory for Fire and Emergency Rescue, China People’s Police University, Beijing 102308, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaNational Engineering Laboratory for Fire and Emergency Rescue, China People’s Police University, Beijing 102308, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, ChinaThe initial moving mechanism of densely packed particles driven by shock waves is unclear but vital for the next accurate calculation of the problem. Here, the initial motion details are investigated experimentally and numerically. We found that before particles show notable motion, shock waves complete reflection and transmission, and stress waves propagate downstream on particle skeleton. Due to the particle stress wave, particles successively accelerate and obtain an axial velocity of 6–8 m/s. Then, the blocked gas pushes the upstream particles integrally to move downstream, while the gas flow in the pores drags the downstream particles to separate dramatically and accelerate to the velocity of 60–70 m/s. This gas push-drag dual mechanism transforms densely packed particles into a dense gas-particle cloud, which behaves as the expansion phenomena of the dense particles.http://dx.doi.org/10.1155/2021/8867615 |
| spellingShingle | Hua Lv Zhongqi Wang Yunming Zhang Jianping Li Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock Wave Shock and Vibration |
| title | Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock Wave |
| title_full | Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock Wave |
| title_fullStr | Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock Wave |
| title_full_unstemmed | Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock Wave |
| title_short | Initial Moving Mechanism of Densely-Packed Particles Driven by a Planar Shock Wave |
| title_sort | initial moving mechanism of densely packed particles driven by a planar shock wave |
| url | http://dx.doi.org/10.1155/2021/8867615 |
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