Numerical schemes by Tobias Holzmann

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  • contributor: Tobias Holzmann
  • affiliation: Holzmann CFD
  • contact: click here for email address
  • OpenFOAM version: 2.1.x-4.x (explicitly stated for each tutorial)
  • published under: GPL v3 license

Go back to Day 4.

[http:// www.holzmann-cfd.de/index.php/en/numerical-schemes Numerical scheme analyzing]

The numerical discretization is treated by choosing different numerical schemes in OpenFOAM. Each numerical scheme behaves different which is demonstrated in a simple convection flow ([http:// www.holzmann-cfd.de/index.php/en/numerical-schemes link]). Here, you will see the influence of the mesh type, hexaeder and tetraeder, the orientation of the mesh and the mesh density on the accuracy of the solution and if the scheme produces physical or also non-physical values. The importance of the scheme that you use and a critical behavior of the Gauss linear scheme is shown [https:// www.youtube.com/watch?v=C0CcN7l37Fg in this video].

  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-upwind Upwind]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-linear Linear]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-linearupwind LinearUpwind]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-limitedlinear LimitedLinear]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-limitedlimitedlinear LimitedLimitedLinear]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-vanleer VanLeer]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-limitedvanleer LimitedVanLeer]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-cubic Cubic]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-limitedcubic LimitedCubic]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-sfcd SFCD]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-quick QUICK]
  • [http:// www.holzmann-cfd.de/index.php/en/numerical-schemes/gauss-umist UMIST]