Titlebook: Direct and Large-Eddy Simulation IV; Bernard J. Geurts,Rainer Friedrich,Olivier Métais Book 2001 Springer Science+Business Media Dordrecht

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A Model Based on Incremental Scales Applied to LES of Turbulent Channel Flow,o different Reynolds numbers are conducted. Results for both simulations are in good agreement with filtered DNS data. A significant improvement is shown compared to simulations with no model at the same low resolutions as the LES. The computational cost of the incremental method is similar to that of a Galerkin approximation on the same grid.

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famine

Partially-Premixed Combustion during Autoignition of a Turbulent Nonpremixed Flame,oichiometric point, and at the same time, a partially-premixed front propagates along isomixture fraction lines. In two dimensions, this flame growth leads to local edge-flame combustion. The particular role of partially-premixed combustion during this complex ignition process is evidenced from the DNS results

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偏离

On the Accuracy of Symmetry-Preserving Discretization, differential operators, i.e. the convective operator is represented by a skew-symmetric matrix and the diffusive operator is approximated by a symmetric, positive-definite matrix. Such a symmetry-preserving discretization of the Navier-Stokes equations is stable on any grid, and conserves the total

inflame

DNS of Turbulent Supersonic Channel Flow, velocity — entropy form of the compressible Navier — Stokes equations is integrated using a fifth order compact upwind scheme for the Euler part, a fourth order Padé scheme for the viscous terms and a third — order low — storage Runge — Kutta time integration method. The work aims at increasing the