A computational study of the effect of unstructured mesh quality on solution efficiency

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It is well known that mesh quality affects both efficiency and accuracy of CFD solutions. Meshes with distorted elements make solutions both more difficult to compute and less accurate. We review a recently proposed technique for improving mesh quality as measured by element angle (dihedral angle in three dimensions) using a combination of optimization-based smoothing techniques and local reconnection schemes. Typical results that quantify mesh improvement for a number of application meshes are presented. We then examine effects of mesh quality as measured by the maximum angle in the mesh on the convergence rates of two commonly used CFD solution ... continued below

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11 p.

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Batdorf, M.; Freitag, L. A. & Ollivier-Gooch, C. September 1997.

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It is well known that mesh quality affects both efficiency and accuracy of CFD solutions. Meshes with distorted elements make solutions both more difficult to compute and less accurate. We review a recently proposed technique for improving mesh quality as measured by element angle (dihedral angle in three dimensions) using a combination of optimization-based smoothing techniques and local reconnection schemes. Typical results that quantify mesh improvement for a number of application meshes are presented. We then examine effects of mesh quality as measured by the maximum angle in the mesh on the convergence rates of two commonly used CFD solution techniques. Numerical experiments are performed that quantify the cost and benefit of using mesh optimization schemes for incompressible flow over a cylinder and weakly compressible flow over a cylinder.

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11 p.

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OSTI as DE97053697

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  • 13. American Institute of Aeronautics and Astronautics computational fluid dynamics conference, Snowmass, CO (United States), 29 Jun - 2 Jul 1997

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  • Other: DE97053697
  • Report No.: ANL/MCS/CP--93710
  • Report No.: CONF-970666--
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 563825
  • Archival Resource Key: ark:/67531/metadc692683

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  • September 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 16, 2015, 5:26 p.m.

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Batdorf, M.; Freitag, L. A. & Ollivier-Gooch, C. A computational study of the effect of unstructured mesh quality on solution efficiency, article, September 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc692683/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.