The Coupling Between Turbulent, Penetrative Convection and Internal Waves PDF Download
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Author: Mark Edward Michaelian
Publisher:
ISBN:
Category :
Languages : en
Pages : 350
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Book Description
Author: Mark Edward Michaelian
Publisher:
ISBN:
Category :
Languages : en
Pages : 350
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Book Description
Author: Pierre Léard
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Coupled dynamics between turbulent and stratified layers are often encountered in geophysical and astrophysical flows, for example in the earth's atmosphere, oceans and core, but also in stars. Due to the large space- and time-scale difference between the phenomenon involved in the two layers, their interaction is sometimes overlooked. Still, the turbulent motions enhance mixing at the interface and generate internal gravity waves which propagate in the stratified layer. Those waves extract energy from the convective layer and distribute this energy along their propagation path. They also carry chemicals and bio-elements. Therefore, the comprehension of the coupled dynamics of a turbulent layer interacting with a stratification one is essential in order to build reliable models predicting the long-time evolution of those flows. This interaction is studied with experiments, numerical simulations and theoretical modelling.
Author: Sergei Sergeevǐc Zilitinkevǐc
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 216
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Book Description
Turbulence is important to hydraulic and environmental engineers and essential to the emerging understanding of natural processes of fluid mixing in pollution and meteorology. This text reviews the understanding, East and West, of turbulent penetrative convection.
Author: Mariejo Goupil
Publisher: Springer
ISBN: 364233380X
Category : Science
Languages : en
Pages : 265
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Book Description
This volume synthesizes the results of work carried out by several international teams of the SIROCO (Seismology for Rotation and Convection) collaboration. It provides the theoretical background required to interpret the huge quantity of high-quality observational data recently provided by space experiments such as CoRoT and Kepler. Asteroseismology allows astrophysicists to test, to model and to understand stellar structure and evolution as never before. The chapters in this book address the two groups of topics summarized as "Stellar Rotation and Associated Seismology" as well as "Stellar Convection and Associated Seismology". The book offers the reader solid theoretical background knowledge and adapted seismic diagnostic techniques.
Author: Mohammad Alamgir Hossain
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
A weighted residual collocation method is investigated to study penetrative turbulence in the atmospheric boundary layer (ABL). In designing such a numerical model for the ABL, one needs to minimize or avoid artificial energy dissipation at the resolved scale, and parameterize the effect of unresolved turbulent mixing to account for the subgrid scale energy dissipation. In this research, the standard mesoscale filtering of conservation laws (mass, momentum, and energy) has been adopted based on the assumption that the characteristic scale of circulation is much less than the density scale hight of the atmosphere. Such mesoscale equations have been filtered with a Deslauriers-Dubuc (DD) interpolating wavelet system along with a Smagorinsky type eddy viscosity model. The time integration is performed by projecting the solution onto a Krylov subspace, and by solving the system with the GMRES (generalized minimal residual) algorithm. The numerical model is verified with the analytical solution of two-dimensional advection-diffusion phenomena, and with two benchmark simulations such as dry thermal rising in the neutrally stratified environment and stationary solutions of urban heat island circulation. The generation of internal waves by a turbulent buoyant element impinging upon the interface between the boundary layer and free atmosphere is characterized. Finally, penetrative turbulence due to differentially heated earth's surface is investigated for a wide range of surface heat flux variations, 25 ≤ H0 ≤ 930 W m−2. Results indicate that the downscale energy cascade is associated with the onset of temporal oscillations in mesoscale circulation, although a fraction of kinetic energy is transferred by internal waves.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 680
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Book Description
Author: Jean-Pierre Rozelot
Publisher: Springer
ISBN: 3642199283
Category : Science
Languages : en
Pages : 349
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Book Description
This volume of lecture notes brings together the knowledge on pulsations of the Sun and the stars, with a particular emphasis on recent observations and modelling, and on the influence of pulsations of other physical processes. The book begins with an extensive introduction to helioseismology. The solar cycle and gravity modes are discussed before the focus is widened from helioseismology to asteroseismology which is detailed in a series of specific chapters. Based on courses given at a graduate school, these tutorial lecture notes will be of interest and useful to a rather broad audience of scientists and students.
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 500
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Book Description
Author:
Publisher: Academic Press
ISBN: 0123757215
Category : Science
Languages : en
Pages : 658
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Book Description
Elements of Physical Oceanography is a derivative of the Encyclopedia of Ocean Sciences, Second Edition and serves as an important reference on current physical oceanography knowledge and expertise in one convenient and accessible source. Its selection of articles—all written by experts in their field—focuses on ocean physics, air-sea transfers, waves, mixing, ice, and the processes of transfer of properties such as heat, salinity, momentum and dissolved gases, within and into the ocean. Elements of Physical Oceanography serves as an ideal reference for topical research. References related articles in physical oceanography to facilitate further research Richly illustrated with figures and tables that aid in understanding key concepts Includes an introductory overview and then explores each topic in detail, making it useful to experts and graduate-level researchers Topical arrangement makes it the perfect desk reference
Author:
Publisher: Academic Press
ISBN: 0123918537
Category : Science
Languages : en
Pages : 893
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Book Description
The book represents all the knowledge we currently have on ocean circulation. It presents an up-to-date summary of the state of the science relating to the role of the oceans in the physical climate system. The book is structured to guide the reader through the wide range of world ocean circulation experiment (WOCE) science in a consistent way. Cross-references between contributors have been added, and the book has a comprehensive index and unified reference list. The book is simple to read, at the undergraduate level. It was written by the best scientists in the world who have collaborated to carry out years of experiments to better understand ocean circulation. - Presents in situ and remote observations with worldwide coverage - Provides theoretical understanding of processes within the ocean and at its boundaries to other Earth System components - Allows for simulating ocean and climate processes in the past, present and future using a hierarchy of physical-biogeochemical models
