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• W2152648081 abstract "A newly proposed hybrid Cartesian-body tted grid (HCBFG) technique[1] is used for o wstructural interactions with large structure deformation. Based on a Cartesian background grid, the new approach automatically searches a near wall boundary(NWB) at any instant when a geometry is given. Within the NWB, a body-tted mesh is generated using an ecien t algebraic method with the skew angle between any two mesh lines guaranteed between 45 and 135 . This is attributed to the fact that only the mesh lines tangential to the solid surface needs to be generated. The mesh lines in the other two directions are from the background Cartesian grid. Outside of the NWB, the Cartesian grid is used. On the NWB, the grid points are one-to-one connected with the Cartesian grid. Hence, a consistent discretization scheme for structured grid can be used with no interpolation needed at the NWB. The fully conservative ux calculation can be achieved. With such grid system, all computation can be done on a xed square grid in the computational domain regardless of the boundary shape and grid movement in the physical domain. Incorporated with existing capabilities of fully-coupled o w-structure interaction, this method can greatly enhance our geometric exibilit y and computational capability. This new approach has the advantages of the Chimera grid and Cartesian grid methods to treat complex or moving geometry, but overcomes the drawbacks of those methods requiring interpolation on the dieren t mesh boundaries. Beneted from the HCBFG, all the rigorous numerical techniques developed for body-tted grid, which are essential to achieve high order accuracy, can be used. The mesh size of the proposed hybrid grid approach will also be substantially smaller than that of a Cartesian grid method or unstructured grids since a highly stretched grid can be used near walls. This new approach may open a door to a new class of CFD technique for ecien tly and accurately simulating steady and unsteady o ws, furthermore, solving moving grid and uid-structural interaction problems with complex geometries. The study cases presented include a steady state transonic RAE2822 airfoil and a vortex-induced oscillating cylinder. The details regarding the mesh deformation and moving mesh, geometric conservation law, and uid-structural coupling procedure are described." @default.
• W2152648081 created "2016-06-24" @default.
• W2152648081 creator A5017382062 @default.
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• W2152648081 date "2010-06-28" @default.
• W2152648081 modified "2023-09-23" @default.
• W2152648081 title "Fully Coupled Fluid-Structural Interaction in a Hybrid Cartesian-Body Fitted Grid System" @default.
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• W2152648081 doi "https://doi.org/10.2514/6.2010-4611" @default.
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