Numerical Investigation of Plane Couette Flow with Weak Spanwise Rotation

ORAL

Abstract

Direct numerical simulation of rotating plane Couette flow (RPCF) at Re=1300 and Ro=0.02 is performed under varying mesh resolutions and different aspect ratios. Our results showed that a grid of 256×71×256 is fine enough to simulate the problem at a computational box of 8πh×2h×4πh. The streamwise length Lx and spanwise length Lz of the computational box have different impacts on the flow statistics, where the statistics were converged if Lx is longer than 8πh, while no converged results were obtained for different Lz. More importantly, our results with very long simulation time showed that a state transition would happen if Lx≥8πh, from a state with four pairs of roll cells to a state with three pairs of roll cells with Lz=6πh. Each state could survive for more than 1500h/Uw, and the flow statistics were different.

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Presenters

  • Yuhan Huang

    State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China

Authors

  • Yuhan Huang

    State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China

  • Zhenhua Xia

    Zhejiang University, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China.

  • Yipeng Shi

    State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China

  • Minping Wan

    Department of Mechanics and Aerospace Engineering Southern University of Science and Technology, Department of Mechanics and Aerospace Engineering Southern University of Science and Technology, Shenzhen 518055, China, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China

  • Shiyi Chen

    Department of Mechanics and Aerospace Engineering Southern University of Science and Technology, State Key Laboratory for Turbulence and Complex Systems and Center for Applie, Department of Mechanics and Aerospace Engineering Southern University of Science and Technology, Shenzhen 518055, China, State Key Laboratory for Turbulence and Complex Syste, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China, State Key Laboratory of Turbulence and Complex, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China, State Key Laboratory of Turbulence, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China, State Key Laboratory for Turbulence and Comple