Parallel direct method for turbulent channel flow (湍流槽道流并行直接求解方法)
Published in Journal of Harbin Institute of Technology (哈尔滨工业大学学报), 2020
Recommended citation: Xi, L., Xie, J., & Bao, Y. (2021). Parallel direct method for turbulent channel flow (in Chinese). Journal of Harbin Institute of Technology, 53(1), 163-167. https://doi.org/10.11918/202001028.
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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 $Re_{\tau}$=176, 544, 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 $Re_{\tau}$=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.