| 颗粒沉降的格子Boltzmann模拟与PIV实验验证 |
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| 引用本文： | 张金凤,张庆河,卢昭.颗粒沉降的格子Boltzmann模拟与PIV实验验证[J].水科学进展,2009,20(4):480-484. |
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| 作者姓名： | 张金凤 张庆河 卢昭 |
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| 作者单位： | 1.天津大学建筑工程学院暨港口与海洋工程教育部重点实验室, 天津, 300072; |
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| 摘 要： | 在格子Boltzmann方法中引入大涡模拟,对球形颗粒在静水中沉降引起的紊动流场进行了数值模拟。数值模拟沉速与理论值以及粒子图像测速系统(PIV)实验结果吻合,验证了模型的合理性。同时分析比较了颗粒沉降过程中尾部紊动流场分布以及尾流流速值,发现数值模拟结果与实测结果趋势、数值基本一致,进一步说明了利用格子Boltzmann方法与大涡模拟技术相结合可以合理模拟泥沙颗粒在紊流区的沉降。
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| 关 键 词： | 球形颗粒 沉降 紊流 格子Boltzmann方法 大涡模拟 粒子图像测速 |
| 收稿时间： | 2008-08-29 |
Lattice Boltzmann simulation of particle settling and experimental validation by PIV |
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| ZHANG Jin-feng,ZHANG Qing-he,LU Zhao.Lattice Boltzmann simulation of particle settling and experimental validation by PIV[J].Advances in Water Science,2009,20(4):480-484. |
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| Authors: | ZHANG Jin-feng ZHANG Qing-he LU Zhao |
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| Affiliation: | 1.School of Civil Engineering, Tianjin University & Key Laboratory of Harbor and Ocean Engineering, Ministry of Education, Tianjin 300072, China;2.China Communications Planning and Design Institute for Water Transportation, Beijing 100007, China |
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| Abstract: | To investigate the behavior of the particlE-laid turbulent flows, a numerical model is presented through the lattice Boltzmann (LB) method with the large eddy simulation. The simulated settling velocity of the spherical particle agrees with the theoretical value and the measured result by the particle imaging velocimetry (PIV). Furthermore, the flow field around particles and the flow velocity in the tail are illustrated. The computed results are basically in accordance with the measured values. It verifies that the LB method and the large eddy simulation can be applied to simulating the particlE-laid turbulent flows. |
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| Keywords: | spherical particle sedimentation turbulent flow lattice Boltzmann method large eddy simulation PIV |
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