| 聚合物槽道湍流的直接数值模拟 |
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| 引用本文： | 张劲柏,郑昭虎.聚合物槽道湍流的直接数值模拟[J].北京航空航天大学学报,2009,35(12):1417-1420. |
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| 作者姓名： | 张劲柏 郑昭虎 |
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| 作者单位： | 北京航空航天大学航空科学与工程学院,北京,100191;北京航空航天大学航空科学与工程学院,北京,100191 |
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| 摘 要： | 应用直接数值模拟方法研究了聚合物对槽道湍流的减阻特性.数值计算方法采用谱方法,时间积分采用二阶精度的时间分裂格式.应用FENE-P模型对聚合物槽道湍流进行定压降的直接数值模拟计算,揭示了聚合物湍流减阻的启动(onset)现象;应用O-B模型进行定流量的直接数值模拟计算,分析了其流动特征.计算结果表明:在低减阻形式中聚合物对湍流的影响主要发生在壁面区,而高减阻形式中聚合物对湍流的影响则遍及全流场.
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| 关 键 词： | 聚合物 槽道湍流 直接数值模拟 减阻 |
| 收稿时间： | 2008-12-05 |
Direct numerical simulation of turbulent channel flow of polymer solution |
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| Zhang Jinbai,Zheng Zhaohu.Direct numerical simulation of turbulent channel flow of polymer solution[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(12):1417-1420. |
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| Authors: | Zhang Jinbai Zheng Zhaohu |
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| Institution: | School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | The drag reduction characteristic of polymer turbulence in channel flows was investigated using the direct numerical simulation(DNS).In the simulations,the spectral methods employing Fourier series and Chebyshev polynomial were used to make the spatial discretization and the time-splitting method with second-order time accuracy was adopted to carry out time advancement.For three-dimension turbulent channel flows of a polymer solution,based on the FENE-P model,the obtained efficiency of drag reduction for th... |
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| Keywords: | polymer channel turbulence direct numerical simulation drag reduction |
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