Titlebook: Direct and Large Eddy Simulation of Turbulence; Proceedings of the E Ulrich Schumann,Rainer Friedrich Conference proceedings 1986 Springer

疾馳

Defense

擔(dān)心

Recent Results on the Structure of Turbulent Shear Flows Using Simulation DatabasesDuring the past year the use of large eddy and direct simulation databases has maEn possible significant advances in our unEnrstanding of the organized structures in turbulent shear flows. Here, I summarize some of these contributions, and cite the references where they are published in their entirety.

Multiple

Subcritical Transition to Turbulence in Channel FlowStokes equations using a spectral method. The classical peak-valley splitting mode of secondary instability is considered. First results of an investigation of the breakdown stages of the transition process are given. Visualizations of the development of three-dimensional flow structures are present

STELL

漂亮才會(huì)豪華

Subgrid Scale Models for Homogeneous Anisotropic Turbulencees are modelled for wavenumbers small relative to the filter cut. The model is then extended to the complete wavenumber range from very large scales to the filter cut. As these pressure and transfer effects are defined as integrals over the subgrid scales, representation of subgrid energy and anisot

Semblance

Sinus-Node

Large-Eddy Simulation of Low Reynolds Number Channel Flow by Spectral and Finite Difference Methodsrical codes, of which one is purely spectral while the other utilises finite differences. Both codes are described, and the relative merits of the two approaches are assessed. The near wall streak structures are well resolved by both the simulations.

織物

Morsel

Numerical Prediction of Turbulent Plane Couette Flow by Large Eddy Simulationh was developed by Deardorff., Schumann. and others is one of the most promising approaches to analyse the turbulence transport phenomena. Recently, Large Eddy Simulation(abbreviated as LES) succeeded in describing the detailed structure of wall turbulent flows.). Of course, the efforts have been co