| 流向振荡圆柱绕流的格子Boltzmann方法模拟 |
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| 引用本文： | 龚帅,郭照立. 流向振荡圆柱绕流的格子Boltzmann方法模拟[J]. 力学学报, 2011, 43(1): 11-17. DOI: 10.6052/0459-1879-2011-1-lxxb2009-702 |
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| 作者姓名： | 龚帅 郭照立 |
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| 作者单位： | 华中科技大学煤燃烧国家重点实验室 |
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| 基金项目： | 国家自然科学基金(50876037,50721005); 提高石油采收率国家重点实验室开放课题资助项目~~ |
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| 摘 要： | 用一种新近发展起来的格子Boltzmann方法(LBM)在相对较小的雷诺数(Re le 200)条件下模拟了不可压缩的流向振荡圆柱绕流问题, 考查了涡脱落模态和升阻力特性. 通过模拟, 在近尾流区发现了实验研究中已经发现的对称/反对称的涡脱落模态, 包括有些传统数值方法未发现的模态. 研究了频率锁定区域的范围及其与振幅的关系, 发现振幅越大, 发生锁定的频率区域越宽. 此外还对升阻力进行了定量意义的模拟,研究了振荡频率和振幅与升阻力的关系.
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| 关 键 词： | 涡脱落模态 |
| 收稿时间： | 2009-11-20 |
LATTICE BOLTZMANN SIMULATION OF THE FLOW AROUND A CIRCULAR CYLINDER OSCILLATING STREAMWISELY |
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| Gong Shuai , Guo Zhaoli. LATTICE BOLTZMANN SIMULATION OF THE FLOW AROUND A CIRCULAR CYLINDER OSCILLATING STREAMWISELY[J]. chinese journal of theoretical and applied mechanics, 2011, 43(1): 11-17. DOI: 10.6052/0459-1879-2011-1-lxxb2009-702 |
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| Authors: | Gong Shuai Guo Zhaoli |
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| Affiliation: | Gong Shuai~(*, ) Guo Zhaoli~( ,2)) *(Mininstry of Education Key Laboratory of Power and Machinery,Shanghai Jiao Tong University,Shanghai 200240,China) (State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China) |
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| Abstract: | A newly developed lattice Boltzmann method (LBM) is used tosimulate the incompressible flow past an oscillating circular cylinder. Boththe vortex shedding modes and fluid forces are investigated. The simulationsare conducted at a relatively low Reynolds number (Re le 200). Numericalresults show the existence of symmetric/asymmetric modes of vortex formationwhich are confirmed by previous experiments in the near wake, including themode which is not found by some traditional numerical methods. Therelationship between oscillation amplitude and lock-on range is studied, andthe results show that the lock-on ranges increase with the increasingoscillation amplitude. The relationship between fluid forces (lift and drag)and oscillation frequency /amplitude is also studied quantitatively. |
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| Keywords: | lattice Boltzmann method streamwise oscillating vortex shedding modes |
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