Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session G38: Direct Numerical Simulations
10:35 AM–12:45 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: Ballroom 1/2
Chair: Gillaume Blanquart, California Institute of Technology
Abstract ID: BAPS.2018.DFD.G38.3
Abstract: G38.00003 : Numerical Investigation of Plane Couette Flow with Weak Spanwise Rotation*
11:01 AM–11:14 AM
Presenter:
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
(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, Shenzhen 518055, China)
Shiyi Chen
(Department of Mechanics and Aerospace Engineering Southern University of Science and Technology, Shenzhen 518055, China, State Key Laboratory for Turbulence and Complex Syste)
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.
*This work was supported by the National Science Foundation of China (NSFC Grant Nos. 11772297 and 11521091).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.G38.3
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