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This paper discusses numerical and modeling issues that arise in cell-centered finite-volume methods (FVM) for large eddy simulation (LES) of compressible flows on unstruc-tured grids. These are: accuracy and stability of flux interpolation scheme, shock capturing strategy, and subgrid-scale (SGS) modeling. To enhance the accuracy of flux reconstruction , a(More)
This paper develops a dynamic error analysis procedure for the numerical errors arising from spatial discretization in large-eddy simulation. The analysis is based on EDQNM closure theory, and is applied to the LES of decaying isotropic turbulence. First, the effects of finite-differencing truncation error, aliasing error and the dynamic Smagorinsky model(More)
We revisit the Germano-identity error in the dynamic modeling procedure in the sense that the current modeling procedure to obtain the dynamic coefficient may not truly minimize the error in the mean and global sense. A " corrector step " to the conventional dynamic Smagorinsky model is proposed to obtain a corrected eddy viscosity which further reduces the(More)
Purely dissipative eddy–viscosity subgrid models have proven very successful in large–eddy simulations (LES) at moderate resolution. Simulations at coarse resolutions where the underlying assumption of small–scale universality is not valid, warrant more advanced models. However, non-eddy viscosity models are often unstable due to the lack of sufficient(More)
We propose a novel shock-capturing method that is based on the ideas of characteristic filters and dynamic suboptimal control. A cost function is based on the smoothness of the solution, and formally minimized to obtain the unknown coefficient in the shock-capturing numerical fluxes. The proposed dynamic procedure is applied to one–dimensional Euler(More)
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