Large Eddy Simulation of Flow Characteristics around Cylinders with Crosswise and Streamwise Arrangements in Ocean Energy

Weiming Zhai, Ming Liu, Changjiu Huang, Daoxi Cheng and Lei Tan ()
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Weiming Zhai: Reactor Thermal-Hydraulic Laboratory, Reactor Engineering Technology Research Institute, China Institute of Atomic Energy, Beijing 102413, China
Ming Liu: State Key Laboratory of Hydroscience and Engineering, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Changjiu Huang: State Grid Sichuan Electric Power Company, Chengdu 610041, China
Daoxi Cheng: Reactor Thermal-Hydraulic Laboratory, Reactor Engineering Technology Research Institute, China Institute of Atomic Energy, Beijing 102413, China
Lei Tan: State Key Laboratory of Hydroscience and Engineering, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2023, vol. 16, issue 22, 1-19

Abstract: The flow around cylinders is one of the most fundamental phenomena in extracting wave energy from ocean waves. Compared with flows around a single cylinder, the investigation of flows around multiple cylinders is still limited and requires further studies to reveal flow characteristics. To this end, large eddy simulations are conducted to investigate the flow around double cylinders with crosswise and streamwise arrangements. Systematic studies on the influence of the number of mesh cells, the first near-wall mesh size, and the transient time step are carried out to achieve accurate and efficient simulations. The drag coefficient, flow separation, and flow pattern for different arrangements under various cylinder spacings are analyzed according to simulation results. For the crosswise arrangement, the flow pattern switches from the single-body regime to the synchronized vortex-shedding regime as the spacing increases. For the streamwise arrangement, the flow pattern develops from the reattachment regime to the vortex-shedding regime as the spacing increases.

Keywords: large eddy simulation; flow around cylinder; crosswise arrangements; streamwise arrangements; ocean energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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