Large Eddy Simulation LES is an approach to compute turbulent flows based on resolving the unsteady large-scale motion of the fluid while the impact of the small-scale turbulence on the large scales is accounted for by a sub-grid scale model.
This model distinguishes LES from any other method and reduces the computational demands compared with a Direct Numerical Simulation. On the other hand, the cost typically is still at least an order of magnitude larger than for steady Reynolds-averaged computations.
LES is the only efficient technique for approaching high Reynolds numbers when Scientific Computation Large Eddy Simulation for Incompressible Flows. The astonishingly rapid development of the Large-Eddy Simulation technique on Large-Eddy Simulation, a very important method in scientific computing and.
The LES approach is attractive when statistical turbulence models fail, when insight into the vortical dynamics or unsteady forces on a body is desired, or when additional features are involved such as large-scale mixing, particle transport, sound generation etc. In recent years the rapid increase of computer power has made LES accessible to a broader scientific community, and this is reflected in an abundance of papers on the method and its applications.
pierreducalvet.ca/34735.php Still, however, some fundamental aspects of LES are not conclusively settled, a fact residing in the intricate coupling between mathematical, physical, numerical and algorithmic issues. In this situation it is of great importance to gain an overview of the available approaches and techniques. Pierre Sagaut, in the style of a French encyclopedist, gives a very complete and exhaustive treatment of the different kinds of sub-grid scale models which have been developed so far. After discussing the separation into resolved and unresolved scales and its application to the Navier-Stokes equations, more than pages are directly devoted to the description of sub-grid scale models.
They are classified according to different criteria, which helps the reader to find his or her way through the arsenal of reasonings. The theoretical framework for which these models have mostly been developed is isotropic turbulence. The required notions from classical turbulence theory are summarized together with notions from EDQNM theory in two concise and helpful appendices.
Interpretation and Problems Boundary Conditions. Examples of Applications A Statistical and Spectral Analysis. Bibliography Droits d'auteur. To see what your friends thought of this book, please sign up.
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This second edition is a greatly enriched version motivated both by the increasing theoretical interest on LES and the increasing numbers of applications. Enkai marked it as to-read Jan 30, Synopsis About this title Large Eddy Simulation for Incompressible Flows First concise textbook on Large-Eddy Simulation, a very important method in scientific computing and engineering From the foreword to the third edition written by Charles Meneveau: " The book addresses researchers as well as graduate students and engineers. Buy Hardcover. Enlarge cover. Pierre Sagaut.