Adaptive Mesh Refinement Computation of Turbulent Flows -- Pitfalls and Escapes

Details Adaptive Mesh Refinement Computation of Turbulent Flows -- Pitfalls and Escapes Adaptive Mesh Refinement Computation of Turbulent Flows -- Pitfalls and Escapes

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..406..249m&link_type=abstract

Numerical Modeling of Space Plasma Flows: ASTRONUM-2008 ASP Conference Series, Vol. 406, proceedings of the conference held 8-13

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Computation

Scientific paper

New numerical procedures are introduced for the adaptive mesh refinement (AMR) computation of turbulent flows using a large eddy simulation (LES) approach. The standard AMR technique of linear interpolation of coarse grid data to obtain fine grid values is shown to introduce a spurious excitation of the turbulence spectrum. The conservative cell averaging of fine grid data to update coarse grid data has a similar effect. Interpolation and restriction procedures that eliminate this effect are introduced. These procedures can be modified to excite the small scales resolvable on new fine grids in accordance with a known turbulent energy spectrum (e.g. Kolmogorov spectrum).

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