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Abstract
Steady incoming flow past a circular cylinder has been a classical problem in fluid mechanics owing to its extensive practical applications in e.g. offshore engineering. In this study, large-eddy simulations are performed for flow past a circular cylinder at the Reynolds number (Re) of 3900. Particular focuses are on the comparisons of different numerical methods and computational domain patterns. The case Re = 3900 is computed with both OpenFOAM and Nektar++, which are based on the conventional finite volume method and the high-order spectral/hp element method, respectively. It is found that the computational cost for the Nektar++ model is only less than 10% of that for the OpenFOAM model. In addition, both circular and C-shaped domains are tested for the OpenFOAM and Nektar++ models. It is found that a circular domain is required for the OpenFOAM model to minimise the footprint of mesh non-orthogonality on the simulated flow, while the Nektar++ model does not have strict requirements for the orthogonality of the mesh. The present findings regarding the computational cost and the domain/mesh patterns are expected to be applicable to the numerical modelling of bluff-body flows in general. Based on Nektar++ and the circular domain, additional simulations are performed at Re = 1000 and 7000. For the three Re values investigated, the Strouhal number, hydrodynamic forces and the streamwise and spanwise vorticity fields are examined and compared.
Original language | English |
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Title of host publication | Proceedings of ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering |
Subtitle of host publication | CFD and FSI |
Publisher | ASME International |
ISBN (Electronic) | 9780791885185 |
DOIs | |
Publication status | Published - 2021 |
Event | 2021 40th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2021 - Virtual, Online Duration: 21 Jun 2021 → 30 Jun 2021 |
Publication series
Name | Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE |
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Volume | 8 |
Conference
Conference | 2021 40th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2021 |
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City | Virtual, Online |
Period | 21/06/21 → 30/06/21 |
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Laminar to turbulent transition in the wake of a circular cylinder
Jiang, H. (Investigator 01)
ARC Australian Research Council
9/01/19 → 8/01/22
Project: Research