2010
DOI: 10.2514/1.j050491
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Hybrid Grid Generation Method for Complex Geometries

Abstract: A hybrid mesh generation method is described to discretize complex geometries. The idea behind this hybrid method is to combine the orthogonality and directionality of a structured grid, the efficiency and simplicity of a Cartesian grid, and the flexibility and ease of an unstructured grid in an attempt to develop an automatic, robust, and fast hybrid mesh generation method for configurations of engineering interest. A semistructured quadrilateral grid is first generated on the wetted surfaces. A background Ca… Show more

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Cited by 22 publications
(11 citation statements)
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“…This example has been often used as a benchmark for Navier-Stokes Equations, since both a converged solution [43] and the reference experimental results [44] are available in literature. In this study, the computational grid, composed of body-fitted layer cells and the surrounding Cartesian cells, total of 158,342 cells (15 cell-layers around the body), is generated by our unstructured meshing tool ("LS-GRID" [45]), in order to examine our limiter on such a grid system that has been recently used for aerodynamic simulations with complex geometries [2,3,11]. The computational domain is only the half of the sphere (y≤0); the minimum spacing near the wall is 1.0e-3 with the stretching ratio 1.3, based on the diameter of 1; the far field boundary is 20 times the diameter away from the wall (Fig.…”
Section: Subsonic Viscous Flow Over Sphere (Cartesian/body-fittedmentioning
confidence: 99%
See 1 more Smart Citation
“…This example has been often used as a benchmark for Navier-Stokes Equations, since both a converged solution [43] and the reference experimental results [44] are available in literature. In this study, the computational grid, composed of body-fitted layer cells and the surrounding Cartesian cells, total of 158,342 cells (15 cell-layers around the body), is generated by our unstructured meshing tool ("LS-GRID" [45]), in order to examine our limiter on such a grid system that has been recently used for aerodynamic simulations with complex geometries [2,3,11]. The computational domain is only the half of the sphere (y≤0); the minimum spacing near the wall is 1.0e-3 with the stretching ratio 1.3, based on the diameter of 1; the far field boundary is 20 times the diameter away from the wall (Fig.…”
Section: Subsonic Viscous Flow Over Sphere (Cartesian/body-fittedmentioning
confidence: 99%
“…NSTRUCTURED grids have gained popularity over the past two decades, since they can handle more complex geometries than the structured counterparts in CFD (computational fluid dynamics) [1][2][3][4][5][6][7][8][9][10][11]. However, there remain several issues in practical uses, in addition to much memory requirement and complicated data structure.…”
Section: Introductionmentioning
confidence: 99%
“…FASTAR is loosely based on the two dimensional work of Luo and others [Luo et al, 2008], with some small exceptions. First, extra care must be taken with three-dimensional topologies due to crossbar scenarios, where neighboring voxels at the same level of refinement have been refined in different directions and their faces do not match, arising from the split tree.…”
Section: Two-dimensional Basis Of Fastarmentioning
confidence: 99%
“…Obviously, this approach requires robust solver support for overset grids, which is not necessarily available in all state-of-the-art software for industrial use. Another approach to improve robustness is the transition to a combination of prismatic, tetrahedral and octtreebased mesh generation procedures, which has been shown to allow a surprising flexibility in the presence of difficult geometric features [9]. From the information available at this time, it is however not clear how the resulting mixed mesh topology and locally biased edge alignment will affect the solution accuracy for three-dimensional boundary layer flows.…”
Section: Introductionmentioning
confidence: 99%