| 引用本文: | 习令楚,谢嘉斌,包芸.湍流槽道流并行直接求解方法[J].哈尔滨工业大学学报,2021,53(1):163.DOI:10.11918/202001028 |
| XI Lingchu,XIE Jiabin,BAO Yun.Parallel direct method for turbulent channel flow[J].Journal of Harbin Institute of Technology,2021,53(1):163.DOI:10.11918/202001028 |
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| 摘要: |
| 采用并行直接求解方法（PDM-DNS）进行湍流槽道流的DNS模拟. 该方法能够实现较高效并行的DNS直接求解,在“天河二号”超级计算机上应用256核计算达到95%以上的并行效率. 4个算例的计算雷诺数分别为Reτ=176、544、960、2000,并与相关的计算结果进行对比,验证了数值结果的可靠性. 利用速度压力法壁面边界条件易于处理的优点,结合浸没边界法技术,在雷诺数Reτ=176的槽道中加入了局部毛刺带,为解决复杂边界条件的槽道流的问题提供了新的方法. |
| 关键词: 浸没边界法 槽道流 湍流 PDM-DNS |
| DOI：10.11918/202001028 |
| 分类号:O357.5 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(11772362) |
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| Parallel direct method for turbulent channel flow |
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XI Lingchu,XIE Jiabin,BAO Yun
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（School of Aeronautics and Astronautics, Sun Yat-Sen University, Guangzhou 510275, China）
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| Abstract: |
| In this study, the direct numerical simulations of turbulent channel flow combined with Parallel Direct Method of DNS (PDM-DNS) are performed, and high parallel efficiency is obtained. A parallel efficiency of over 95% can be achieved on 256 cores of the Tianhe-2 supercomputer. Statistics of four cases with Reτ=6,4, 960 and 2000 have been compared with the Lee&Moser’s results and the reliability is verified. Further, based on the advantage of finite-difference with immersed boundary condition easy to deal with wall boundary condition, a simulation added local burr band at Reτ=176 has been performed to realize research of complex boundary condition. The proposed method provides a new tool for the study of turbulent channel flow with complex boundary condition. |
| Key words: immersed boundary condition channel flow turbulence PDM-DNS |
