| 串列对转双圆柱的多块LB模拟 |
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| 引用本文： | 陶实,周力,宗智.串列对转双圆柱的多块LB模拟[J].计算物理,2013,30(2):159-168. |
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| 作者姓名： | 陶实 周力 宗智 |
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| 作者单位： | 大连理工大学 船舶工程学院, 大连 116024 |
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| 基金项目： | 国家自然科学基金(50921001);国家重点基础研究发展计划(2010CB832700)资助项目 |
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| 摘 要： | 结合格子玻尔兹曼方法(Lattice Boltzmann Method,简称LBM)和多块网格(Multi-Block Grid)技术,数值研究较小雷诺数(Re=100)下均匀来流绕串列对转双圆柱问题,综合分析圆柱中心间距比S/D和圆柱无量纲旋转速度α对流场结构的影响,考察前、后圆柱的涡脱落形态和升阻力特性.结果表明:当间距比为1.2时存在一临界旋转比αc,转速超过这一值后前圆柱产生负Magnus效应;间距比为2时,流场出现类似单旋转圆柱时的第二不稳定模态;当间距比较大(S/D=4、6)时,前、后柱之间存在涡脱落,后柱尾涡中出现2S、2S*、2P、P+S等多种形态.
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| 关 键 词： | 串列双圆柱 旋转 格子Boltzmann方法 多块网格 |
| 收稿时间： | 2012-05-23 |
| 修稿时间： | 2012-10-21 |
Multi-Block Lattice Boltzmann Method for Flows Around two Tandem Rotating Circular Cylinders |
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| TAO Shi,ZHOU Li,ZONG Zhi.Multi-Block Lattice Boltzmann Method for Flows Around two Tandem Rotating Circular Cylinders[J].Chinese Journal of Computational Physics,2013,30(2):159-168. |
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| Authors: | TAO Shi ZHOU Li ZONG Zhi |
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| Institution: | School of Naval Structure, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | Flows past a pair of rotating circular cylinders in tandem arrangement at Re=100 are studied numerically.Multi-block lattice Boltzmann method(LBM) is used.Basic features of vortex shedding and forces acting on rotating circular cylinders are studied with comprehensive analysis of impact of cylindrical center spacing ratio S/D and rotational speed α.There exists a critical rotating speed at S/D=1.2,exceeding which the former cylinder produces a negative Magnus lift;As S/D=2,flow field emerges a second unstable mode similar to a single rotating cylinder;At relative large spacings(S/D=4、6),vortex sheds between cylinders.Wake flows of the later cylinder present a variety of forms of 2S、2S*、2P、P+S and so on. |
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| Keywords: | tandem circular cylinders rotating lattice Boltzmann method multi-block |
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