| 二维格子Boltzmann方法圆柱绕流湍流模拟 |
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| 引用本文： | 周新刚,陈效鹏,刘伟明,刘明.二维格子Boltzmann方法圆柱绕流湍流模拟[J].武汉大学学报(工学版),2012,45(1):10-15. |
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| 作者姓名： | 周新刚 陈效鹏 刘伟明 刘明 |
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| 作者单位： | 1. 西北工业大学力学与土木建筑学院,陕西西安,710072
2. 西北工业大学翼型、叶栅空气动力学国防科技重点实验室,陕西西安,710072 |
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| 基金项目： | 国家自然科学基金项目，教育部博士点基金项目，航天科技支撑基金项目，西北工业大学基础研究基金项目 |
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| 摘 要： | 采用多松弛格子Boltzmann方法的大涡模拟技术对二维圆柱绕流问题进行了数值模拟.运用二阶插值反弹格式处理圆柱边界,同时结合Wall-Adapting Local Eddy-viscosity模型(WALE)对壁面附近湍流粘性进行修正,测算了其升、阻力系数和涡脱落频率.结果显示:在雷诺数小于300时,升、阻力系数以及涡脱落频率均跟实验值吻合较好;对于较高Re数问题,其三维效应不能忽略,模拟结果跟实验值有所偏差,但通过引入WALE模型进行壁面修正,该方法较其他二维方法在估算阻力系数上精度有明显提高.
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| 关 键 词： | 格子Boltzmann 多松弛 圆柱绕流 大涡模拟 |
Two-dimensional simulation of flow around cylinder with multiple-relaxation-time lattice Boltzmann method |
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| ZHOU Xingang,CHEN Xiaopeng,LIU Weiming,LIU Ming.Two-dimensional simulation of flow around cylinder with multiple-relaxation-time lattice Boltzmann method[J].Engineering Journal of Wuhan University,2012,45(1):10-15. |
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| Authors: | ZHOU Xingang CHEN Xiaopeng LIU Weiming LIU Ming |
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| Affiliation: | 1(1.School of Mechanics,Civil Engineering and Architecture,Northwestern Polytechnical University, Xi’an 710072,China;2.National Key Laboratory of Science and Technology on Aerodynamics Design and Research,Northwestern Polytechnical University,Xi’an 710072,China) |
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| Abstract: | Based on the multiple-relaxation-time lattice Boltzmann method,large eddy simulation is adopted to explore the flow around a two-dimensional cylinder.The interpolation bounce-back boundary condition is used to treat the boundary of the cylinder,and wall-adapting local eddy-viscosity(WALE) model is used to adjust the turbulent viscosity near the wall.The lift coefficient,drag coefficient and vortex shedding frequency are calculated.When the Reynolds number is lower than 300,the vortex shedding frequency,drag coefficient and lift coefficient coincide with the experimental values.The results also show,for higher Reynolds number flow,3D eddy’s structures play important roles during the flow.However,the correction of wall turbulence viscosity improves the accuracy during the two-dimensional simulation. |
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| Keywords: | lattice Boltzmann method multiple-relaxation-time flow around cylinder large eddy simulation |
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