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| Dynamic analysis of the double columnar particles in a linear shear flow |
| Received:September 01, 2021 Revised:December 20, 2021 |
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| DOI：10.7511/jslx20210901001 |
| KeyWord:columnar particle linear shear flow wall direct forcing immersed boundary method dynamics |
| Author | Institution |
| 郑乐梅 |
中国计量大学 浙江省流量计量技术研究重点实验室, 杭州 |
| 尹招琴 |
中国计量大学 浙江省流量计量技术研究重点实验室, 杭州 |
| 王彦入 |
中国计量大学 浙江省流量计量技术研究重点实验室, 杭州 |
| 沈家鑫 |
中国计量大学 浙江省流量计量技术研究重点实验室, 杭州 |
| 包福兵 |
中国计量大学 浙江省流量计量技术研究重点实验室, 杭州 |
| 周锟 |
武汉科技大学 省部共建耐火材料与冶金国家重点实验室, 武汉 |
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| Abstract: |
| Based on the direct forcing immersed boundary method, this paper presents numerical simulations of the movement of the double columnar particles in a three-dimensional linear shear flow to study the movement state and force of columnar particles.The aspect ratios of the double columnar particles are 2, and the initial distance between the particles ΔSPy is 4D.According to the simulation results, the parameter distribution of the flow around the columnar particles is obtained.The changes in force and movement of the columnar particles as well as the law of the movement and rotation of the particles caused by the fluid drag force are studied, considering the influence of wall on particles and the mutual influence between the two particles.Results show that the double columnar particles tend to move towards the high-speed area in a linear shear flow.The movement and trajectory of the two particles are different.The drag force fluctuations are greater if the distance between the particles is relatively close.The lagging particle can catch up with the leading particle when they move near the wall, and the drafting, tumbling and separating occur. |
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