A Domain-Decomposition (DD) strategy is proposed for problems involving regions with slow variations of the flow (A) and others where the fluid features undergo rapid changes (B), like in the case of steady current past bodies with pronounced local unsteadiness connected with the vortex shedding from the structures. For an efficient and accurate solution of such problems, the DD couples a Finite Difference solver of the Navier-Stokes equations (FD-NS) with a Multiple Relaxation Time Lattice Boltzmann method (MRT-LBM). Regions A are handled by FD-NS, while zones B are solved by MRT-LBM and the two solvers exchange information within a strong coupling strategy. Present DD strategy is able to deal with a dynamic change of the sub-domains topology. This feature is needed when regions with vorticity shed from the body vary in time for a more flexible and reliable solution strategy. Its performances in terms of accuracy and efficiency have been successfully assessed by comparing the hybrid solver against a full FD-NS solution and experimental data for a 2D circular cylinder in an impulsively started flow.
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ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2015
St. John’s, Newfoundland, Canada
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5659-8
PROCEEDINGS PAPER
Dynamic Domain Decomposition Strategy Coupling Lattice Boltzmann Methods With Finite Differences Approximations of the Navier-Stokes Equations to Study Bodies in Current
Giuseppina Colicchio,
Giuseppina Colicchio
CNR-INSEAN, Rome, Italy
NTNU, Trondheim, Norway
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Claudio Lugni,
Claudio Lugni
CNR-INSEAN, Rome, Italy
NTNU, Trondheim, Norway
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Marilena Greco,
Marilena Greco
NTNU, Trondheim, Norway
CNR-INSEAN, Rome, Italy
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Odd M. Faltinsen
Odd M. Faltinsen
NTNU, Trondheim, Norway
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Giuseppina Colicchio
CNR-INSEAN, Rome, Italy
NTNU, Trondheim, Norway
Claudio Lugni
CNR-INSEAN, Rome, Italy
NTNU, Trondheim, Norway
Marilena Greco
NTNU, Trondheim, Norway
CNR-INSEAN, Rome, Italy
Odd M. Faltinsen
NTNU, Trondheim, Norway
Paper No:
OMAE2015-42195, V011T12A030; 7 pages
Published Online:
October 21, 2015
Citation
Colicchio, G, Lugni, C, Greco, M, & Faltinsen, OM. "Dynamic Domain Decomposition Strategy Coupling Lattice Boltzmann Methods With Finite Differences Approximations of the Navier-Stokes Equations to Study Bodies in Current." Proceedings of the ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. Volume 11: Prof. Robert F. Beck Honoring Symposium on Marine Hydrodynamics. St. John’s, Newfoundland, Canada. May 31–June 5, 2015. V011T12A030. ASME. https://doi.org/10.1115/OMAE2015-42195
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