Abstract
The paper presents a novel hybrid approach developed to improve the resolution of concentrated vortices in computational fluid mechanics. The method is based on combination of a grid based and the grid free computational vortex (CVM) methods. The large scale flow structures are simulated on the grid whereas the concentrated structures are modeled using CVM. Due to this combination the advantages of both methods are strengthened whereas the disadvantages are diminished. The procedure of the separation of small concentrated vortices from the large scale ones is based on LES filtering idea. The flow dynamics is governed by two coupled transport equations taking two-way interaction between large and fine structures into account. The fine structures are mapped back to the grid if their size grows due to diffusion. Algorithmic aspects of the hybrid method are discussed. Advantages of the new approach are illustrated on some simple two dimensional canonical flows containing concentrated vortices.
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Acknowledgements
The support of the author by the Japanese Society for Promotion of Science (JSPS) under Grant S-14062 and the German Research Foundation (Deutsche Forschungsgemeinschaft) under the Grants AB 112/10-1 and INST 264/113-1 FUGG is gratefully acknowledged.
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Kornev, N. Hybrid method based on embedded coupled simulation of vortex particles in grid based solution. Comp. Part. Mech. 5, 269–283 (2018). https://doi.org/10.1007/s40571-017-0167-2
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DOI: https://doi.org/10.1007/s40571-017-0167-2