Titlebook: Recent Advances in DNS and LES; Proceedings of the S Doyle Knight,Leonidas Sakell Conference proceedings 1999 Springer Science+Business Med

ETCH

Non-Reflecting Boundary Conditions for DNS in Curvilinear Coordinates complex geometry have been developed based on the characteristic analysis and the modified Navier-Stokes equation. Viscous terms are taken into account to include the viscous effect near the wall. All boundary conditions are added implicitly to the equations of interior points to ensure the stabili

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DNS to Help Understanding of Non-Premixed Turbulent Flamesds are interestingly predicted by CFD, but detailed simulations of a real combustion chamber are far from being routine. This is due to the complexity of combustion problems, involving strong coupling between chemistry, transport phenomena and fluid dynamics (Bray, 1996).

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DNS of Compressible Reacting Mixing Layers with Parallel Compact Schemelas are complicated to parallelize. This paper therefore presents the progress that has been made toward the development of an efficient and scalable parallel procedure for investigating nonlinear three-mode mixing mechanisms.

Bricklayer

Large Eddy Simulation of Stationary Premixed Flames Using a Subgrid Flamelet Approachion, the qualitative effects of heat release on the flow field are captured. The turbulence predictions in the combustor is highly sensitive to the characteristics of inflow turbulence. The turbulence modeling capability needs to be improved in order to better test the model in this case.

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The Subgrid-Scale Estimation Modelid scale stresses are then computed directly from the definitions using the estimated fields. The modeling procedure is described and evaluated by comparing results of large eddy simulations of turbulent channel flow with the corresponding results of direct numerical simulations and experiments.