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Large eddy simulation of flow past a bluff body using immersed boundary method

Large eddy simulation of flow past a bluff body using immersed boundary method
Large eddy simulation of flow past a bluff body using immersed boundary method
An efficient and accurate finite volume incompressible flow solver with a staggered arrangement in the Cartesian grid has been developed to simulate turbulent flow past a moving bluff body. To simulate flow around a bluff body, an efficient immersed boundary method is implemented to construct geometry in the Cartesian grid, which substantially simplifies the mesh generation for complex geometries. In this paper, flow past a stationary square cylinder at Reynolds number 21,400, based on cylinder width and free stream velocity, is studied by LES with the developed immersed boundary method. The sensitivity
of resolution is tested and convergence is achieved. Both experimental and numerical results are used for validation. The global aerodynamic quantities such as lift and drag coefficients and Strouhal number are in good agreement with reference data. The turbulent statistics, in particular in the shear layer and wake regions are compared rigorously with the reference data as well. The developed solver is able to accurately predict the surface force fluctuation, which is extremely challenging from a numerical point of view.
ECCOMAS
Chen, Yongxin
634612c1-2eee-429e-b9f5-cea9fc105ffc
Djidjeli, Kamal
94ac4002-4170-495b-a443-74fde3b92998
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Chen, Yongxin
634612c1-2eee-429e-b9f5-cea9fc105ffc
Djidjeli, Kamal
94ac4002-4170-495b-a443-74fde3b92998
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0

Chen, Yongxin, Djidjeli, Kamal and Xie, Zheng-Tong (2018) Large eddy simulation of flow past a bluff body using immersed boundary method. In 6th European Conference on Computational Mechanics (ECCM 6) & 7th European Conference on Computational Fluid Dynamics (ECFD 7). ECCOMAS..

Record type: Conference or Workshop Item (Paper)

Abstract

An efficient and accurate finite volume incompressible flow solver with a staggered arrangement in the Cartesian grid has been developed to simulate turbulent flow past a moving bluff body. To simulate flow around a bluff body, an efficient immersed boundary method is implemented to construct geometry in the Cartesian grid, which substantially simplifies the mesh generation for complex geometries. In this paper, flow past a stationary square cylinder at Reynolds number 21,400, based on cylinder width and free stream velocity, is studied by LES with the developed immersed boundary method. The sensitivity
of resolution is tested and convergence is achieved. Both experimental and numerical results are used for validation. The global aerodynamic quantities such as lift and drag coefficients and Strouhal number are in good agreement with reference data. The turbulent statistics, in particular in the shear layer and wake regions are compared rigorously with the reference data as well. The developed solver is able to accurately predict the surface force fluctuation, which is extremely challenging from a numerical point of view.

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More information

Published date: June 2018
Venue - Dates: 6th European Conference on Computational Mechanics (ECCM 6) & 7th European Conference on Computational Fluid Dynamics (ECFD 7), United Kingdom, 2018-06-10 - 2018-06-14

Identifiers

Local EPrints ID: 423277
URI: http://eprints.soton.ac.uk/id/eprint/423277
PURE UUID: 7f4a9468-3b78-4db3-a1dc-a8f703e087a2
ORCID for Zheng-Tong Xie: ORCID iD orcid.org/0000-0002-8119-7532

Catalogue record

Date deposited: 20 Sep 2018 16:30
Last modified: 07 Aug 2020 01:35

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