Abstract
Cartesian grids with local anisotropic adaptation are combined with an Immersed Boundary (IB) method and used to perform large eddy simulations. The approach used to generate Cartesian grids with desired normal and tangential resolution to three-dimensional surfaces is described. Anisotropic refinement result in a considerable reduction in grid size. An IB treatment based on solution reconstruction is proposed; it has the property of ensuring local mass conservation and its accuracy is investigated for laminar and turbulent flows in channel not aligned with the grid. Mesh modifications that improve the grid quality for LES are proposed. The resulting mesh then requires a fully unstructured discretization and a parallel polyhedral-based finite-volume solver is applied to perform simulations of the flow around several spheres.
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Iaccarino, G., Ham, F. (2007). LES on Cartesian Grids with Anisotropic Refinement. In: Kassinos, S.C., Langer, C.A., Iaccarino, G., Moin, P. (eds) Complex Effects in Large Eddy Simulations. Lecture Notes in Computational Science and Engineering, vol 56. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-34234-2_16
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DOI: https://doi.org/10.1007/978-3-540-34234-2_16
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