Directional Agglomeration with Quadtree Based Coarsening for 2D Anisotropic Unstructured Grids

Zong Zhe Li; Zheng Hua Wang; Wei Cao; Lu  Yao

doi:10.4028/www.scientific.net/AMM.251.10

Paper Titles

Preface, Committees and Sponsors

Experimental Study on Metal Base Disrepair of Ladle Slide Gate System Based on Temperature/Stress Analysis
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Directional Agglomeration with Quadtree Based Coarsening for 2D Anisotropic Unstructured Grids
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Three-Dimensional Numerical Simulation of the Whole Flow Field on Centrifugal Fan
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Application of Rough Set-Neural Network System in Bearing Fault Diagnosis
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Automatic Test System for the Basic Properties of Solar Cells
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The Design Method of the Hyperbola Profile in the Impeller Meridional Plane of Engine Water Pump
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Establishment and Application of an Equivalent Impact Model of Coupler in Front of Subway Locomotive
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Analysis of Strength of Energy Storage Flywheel Rotating at a High Speed
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 251Directional Agglomeration with Quadtree Based...

Directional Agglomeration with Quadtree Based Coarsening for 2D Anisotropic Unstructured Grids

Abstract:

This paper develops an automatic nested agglomeration methodology for 2D multigrid flow solutions over anisotropic unstructured grids. The algorithm combines isotropic quadtree based coarsening and anisotropic directional agglomeration method to yield a desired coarsening ratio and high quality of coarse grids, which works on cell-centered finite volume scheme. This coarsening strategy developed is presented on an unstructured grid over the RAE2822 airfoil. It is shown that the present method provides more suitable coarsening ratio and aspect ratio at all coarse grid levels than only quadtree based coarsening method.

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Periodical:

Applied Mechanics and Materials (Volume 251)

Pages:

10-14

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.251.10

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Online since:

December 2012

Authors:

Zong Zhe Li, Zheng Hua Wang, Wei Cao, Lu Yao

Keywords:

Agglomeration Multigrid, Cell-Centered, Quadtree, Unstructured Grid

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References

[1] M.H. Lallemand, H. Steve, A. Dervieux, Unstructured multigridding by volume agglomeration: Current status, Computers & Fluids. 21 (1992) 397-433.

DOI: 10.1016/0045-7930(92)90047-y

Google Scholar

[2] W.A. Smith, Multigrid solution of transonic flow on unstructured grids, Adv. App. Comp. Flu. Dyn. (1990).

Google Scholar

[3] D. Strauss, J.L.F. Azevedo, On the development of an agglomeration multigrid solver for turbulent flows. J. Braz. Soci. Eng. 25 (2003) 315–324..

DOI: 10.1590/s1678-58782003000400001

Google Scholar

[4] K.A. Sørensen, O. Hassan, K. Morgan and N.P. Weatherill, Agglomerated multigrid on hybrid unstructured meshes for compressible flow, Int. J. Numer. Meth. Fluids, 40 (2002) 593-603.

DOI: 10.1002/fld.316

Google Scholar

[5] M. Emel, H.T. ismail, A Haluk, Development of a Quadtree Based Agglomeration Method for a Multigrid Viscous Flow Solver on Unstructured Grids, AIAA paper 2010-316.

DOI: 10.2514/6.2010-316

Google Scholar

[6] M. Emel, H.T. Ismail, A Haluk,Octree Based 3-D Unstructured Grid Coarsening and Multigrid Viscous Flow Solutions, AIAA paper 2011-757.

DOI: 10.2514/6.2011-757

Google Scholar

[7] J. Francescatto, A. Dervieux. A semi-coarsening strategy for unstructured multigrid with agglomeraton. Technical Report RR-2950, INRIA, (1996).

Google Scholar

[8] D.J. Mavriplis, Directional agglomeration multigrid techniques for high-reynolds-number viscous flows. AIAA Journal 37 (1999).

DOI: 10.2514/3.14312

Google Scholar