Development of a Large-eddy Simulation Code for the Atmospheric Boundary Layer
Author: Pontus von Schoenberg
Publisher:
Published: 2004
Total Pages: 33
ISBN-13:
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Author: Pontus von Schoenberg
Publisher:
Published: 2004
Total Pages: 33
ISBN-13:
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Publisher:
Published: 1994
Total Pages:
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Publisher:
Published: 1992
Total Pages: 140
ISBN-13:
DOWNLOAD EBOOKLarge eddy simulation, LES, has often been carried out for the idealized situation of a simple convective boundary layer. Studies of dual Doppler radar and aircraft data from the Phoenix II experiment indicate that the boundary layer of the Colorado High Plains is not a purely convective boundary layer and it is influenced by the mountains to the west. The purpose of this study is to investigate the atmospheric boundary layer on one particular day on the Colorado High Plains. This research applies a LES nested within larger grids, which contain realistic topography and can simulate the larger-scale circulations initiated by the presence of the mountain barrier. How and to what extent the atmospheric boundary layer of the Colorado High Plains is influenced by larger scale circulations and other phenomena associated with the mountain barrier to the west is investigated. The nested grid LES reproduces the characteristics of the atmosphere for the case study day reasonably well. The mountains influence the atmospheric boundary layer over the plains to the east in several ways. The mountains contribute to the vertical shear of the horizontal winds through the thermally-induced mountain-plains circulation. As a consequence of the wind shear, the boundary layer that develops over the mountains is advected eastward over the top of the plains boundary layer, which is developing separately. This layer is marked by a mixture of gravity waves and turbulence and is atypical of a purely convective boundary layer. Just below this layer, the capping inversion of the plains boundary layer is weak and poorly defined compared to the inversions capping purely convective boundary layers. Gravity waves, triggered by the obstacle of the Rocky Mountains and by convection in the mountain boundary layer, also influence the atmosphere above the Colorado High Plains. These influences are found to have significant effects on the turbulence statistics and the energy spectra.
Author: Wolfgang Rodi
Publisher: CRC Press
Published: 2013-06-27
Total Pages: 266
ISBN-13: 0203797574
DOWNLOAD EBOOKAn introduction to the Large-Eddy-Simulation (LES) method, geared primarily toward hydraulic and environmental engineers, the book covers special features of flows in water bodies and summarizes the experience gained with LES for calculating such flows. It can also be a valuable entry to the subject of LES for researchers and students in all fields of fluids engineering, and the applications part will be useful to researchers interested in the physics of flows governed by the dynamics of coherent structures.
Author: P. Sagaut
Publisher: Springer Science & Business Media
Published: 2006
Total Pages: 600
ISBN-13: 9783540263449
DOWNLOAD EBOOKFirst 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: "... this meticulously assembled and significantly enlarged description of the many aspects of LES will be a most welcome addition to the bookshelves of scientists and engineers in fluid mechanics, LES practitioners, and students of turbulence in general."
Author: John C. Wyngaard
Publisher: Cambridge University Press
Published: 2010-01-28
Total Pages: 407
ISBN-13: 1139485520
DOWNLOAD EBOOKBased on his over forty years of research and teaching, John C. Wyngaard's textbook is an excellent up-to-date introduction to turbulence in the atmosphere and in engineering flows for advanced students, and a reference work for researchers in the atmospheric sciences. Part I introduces the concepts and equations of turbulence. It includes a rigorous introduction to the principal types of numerical modeling of turbulent flows. Part II describes turbulence in the atmospheric boundary layer. Part III covers the foundations of the statistical representation of turbulence and includes illustrative examples of stochastic problems that can be solved analytically. The book treats atmospheric and engineering turbulence in a unified way, gives clear explanation of the fundamental concepts of modeling turbulence, and has an up-to-date treatment of turbulence in the atmospheric boundary layer. Student exercises are included at the ends of chapters, and worked solutions are available online for use by course instructors.
Author: Working Group on Large-Eddy Simulation (Boulder, Colo.)
Publisher:
Published: 1984
Total Pages: 122
ISBN-13:
DOWNLOAD EBOOKAuthor: Marco Giovanni Giometto
Publisher:
Published:
Total Pages: 0
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DOWNLOAD EBOOKAuthor: M. Lesieur
Publisher: Cambridge University Press
Published: 2005-08-22
Total Pages: 240
ISBN-13: 9780521781244
DOWNLOAD EBOOKLarge-Eddy Simulations of Turbulence is a reference for LES, direct numerical simulation and Reynolds-averaged Navier-Stokes simulation.
Author: Luigi Carlo Berselli
Publisher: Springer Science & Business Media
Published: 2006
Total Pages: 378
ISBN-13: 9783540263166
DOWNLOAD EBOOKThe LES-method is rapidly developing in many practical applications in engineering The mathematical background is presented here for the first time in book form by one of the leaders in the field