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- W2331591108 abstract "This paper investigates the effect of grid refinement on LES results for constant and variable density turbulent round jets. The constant density jet is evaluated with both the dynamic Smagorinsky and dynamic mixed nonlinear models for subgrid momentum transport at five different resolutions. The variable density helium-air jet, using the common combination of the dynamic Smagorinsky model for momentum and the dynamic eddy diffusivity model for mixture fraction, is evaluated on three different grids with different resolution of the transition region. We assess the sensitivity of the LES to spatial resolution in terms of the ability to predict mean velocity and Reynolds stress profiles. Also, the dimensionless subgrid scale dissipation is examined to provide further insight into flow dynamics and coupling between numerical and modeling errors. Beyond a certain grid refinement level, the LES predictions show evidence of grid independence; further, if the transition region of the jet is sufficiently well represented, then the accuracy of the full simulation is less affected by coarser downstream resolution." @default.
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- W2331591108 date "2011-01-04" @default.
- W2331591108 modified "2023-09-23" @default.
- W2331591108 title "Grid refinement strategies for large eddy simulation of round jets" @default.
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- W2331591108 doi "https://doi.org/10.2514/6.2011-280" @default.
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