Large Eddy Simulation for Compressible Flows

Lingua: inglese

Editore: Springer, NL, 2012

9400736703 / 9789400736702

Serie: Libro 7 di 36 - Scientific Computation

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Turbulent ?ows are ubiquitous in most application ?elds, ranging from - gineering to earth sciences and even life sciences. Therefore, simulation of turbulent ?ows has become a key tool in both fundamental and applied - search. The complexity of Navier-Stokes turbulence, which is illustrated by the fact that the number of degrees of freedom of turbulence grows faster 11/4 thanO(Re ), where Re denotes the Reynolds number, renders the Direct Numerical Simulation (DNS) of turbulence inapplicable to most ?ows of - terest. To alleviate this problem, truncated solutions in both frequency and wavenumbermaybesought,whosecomputationalcostismuchlowerandmay ideally be arbitrarily adjusted. The most suitable approach to obtain such a low-cost three-dimensional unsteady simulation of a turbulent ?ow is Large- EddySimulation(LES),whichwaspioneeredtocomputemeteorological?ows in the late 1950s and the early 1960s. One of the main issues raised by LES is a closure problem: because of the non-linearity of the Navier-Stokes equations, the e?ect of unresolved scales must be taken into account to recover a reliable description of resolved scales of motion (Chap. 2).This need to close the governing equations of LES has certainly been the main area of investigation since the 1960s, and numerous closures,alsoreferredtoassubgridmodels,havebeenproposed. Mostexisting subgrid models have been built using simpli?ed viewsof turbulence dynamics, the main physical phenomenon taken into account being the direct kinetic - ergycascade from largeto small scales that is observed in isotropic turbulence and high-Reynolds fully developed turbulent ?ows. The most popular pa- digm for interscale energy transfer modeling is subgrid viscosity (Chap.

Codice articolo LU-9789400736702

Titolo
Large Eddy Simulation for Compressible Flows
Autore
Eric Garnier, Nikolaus Adams, P. Sagaut
Editore
Springer, NL
Anno di pubblicazione
2012
Condizione
New
Rilegatura
Paperback
Lingua
inglese
ISBN 10
9400736703
ISBN 13
9789400736702
Edizione
2009 ed.
Serie
Libro 7 di 36: Scientific Computation

Rarewaves.com USA

London, London, Regno Unito

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