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Large Eddy Simulation for Compressible Flows

Large Eddy Simulation for Compressible Flows PDF Author: Eric Garnier
Publisher: Springer Science & Business Media
ISBN: 9048128196
Category : Science
Languages : en
Pages : 276

Book Description
This book addresses both the fundamentals and the practical industrial applications of Large Eddy Simulation (LES) in order to bridge the gap between LES research and the growing need to use it in engineering modeling.

Large Eddy Simulation for Compressible Flows

Large Eddy Simulation for Compressible Flows PDF Author: Eric Garnier
Publisher: Springer Science & Business Media
ISBN: 9048128196
Category : Science
Languages : en
Pages : 276

Book Description
This book addresses both the fundamentals and the practical industrial applications of Large Eddy Simulation (LES) in order to bridge the gap between LES research and the growing need to use it in engineering modeling.

On Large-eddy Simulation of Compressible Flows

On Large-eddy Simulation of Compressible Flows PDF Author: M. Y. Hussaini
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description


Large eddy simulation of compressible flows using the finite volume method

Large eddy simulation of compressible flows using the finite volume method PDF Author:
Publisher:
ISBN:
Category :
Languages : de
Pages :

Book Description


Large Eddy Simulation of Complex Engineering and Geophysical Flows

Large Eddy Simulation of Complex Engineering and Geophysical Flows PDF Author: Boris Galperin
Publisher: Cambridge University Press
ISBN: 0521430097
Category : Technology & Engineering
Languages : en
Pages : 600

Book Description
Originally published in 1993, this book was the first to offer a comprehensive review of large eddy simulations (LES) - the history, state of the art, and promising directions for research. Among topics covered are fundamentals of LES; LES of incompressible, compressible, and reacting flows; LES of atmospheric, oceanic, and environmental flows; and LES and massivelt parallel computing. The book grew out of an international workshop that, for the first time, brought together leading researchers in engineering and geophysics to discuss developments and applications of LES models in their respective fields. It will be of value to anyone with an interest in turbulence modelling.

Direct and Large-Eddy Simulation VII

Direct and Large-Eddy Simulation VII PDF Author: Vincenzo Armenio
Publisher: Springer Science & Business Media
ISBN: 9048136520
Category : Technology & Engineering
Languages : en
Pages : 646

Book Description
After Surrey in 1994, Grenoble in 1996, Cambridge in 1999, Enschede in 2001, Munich in 2003 and Poiters in 2005, the 7th Workshop, DLES7, will be held in Trieste, again under the auspices of ERCOFTAC. Following the spirit of the series, the goal of this latest workshop is to establish a state-of-the-art of DNS and LES techniques for the computation and modeling of transitional/turbulent flows covering a broad scope of topics such as aerodynamics, acoustics, combustion, multiphase flows, environment, geophysics and bio-medical applications. This gathering of specialists in the field should once again be a unique opportunity for discussions about the more recent advances in the prediction, understanding and control of turbulent flows in academic or industrial situations.

Large Eddy Simulation of Compressible Channel Flow

Large Eddy Simulation of Compressible Channel Flow PDF Author: Jeffrey Paul Ridder
Publisher:
ISBN:
Category :
Languages : en
Pages : 358

Book Description
A large eddy simulation method for compressible channel flow simulations is developed and validated. The method separates the resolvable scale motions from the unresolvable (subgrid) scales by applying a spatial filter to the compressible Navier-Stokes equations. The Leonard and cross terms which appear due to the filtering procedure are modeled based on a Taylor series expansion. The subgrid scale Reynolds terms are modeled using a compressible extension of an existing incompressible model for wall bounded flows. The equations are solved numerically using a modified four-step Runge-Kutta procedure in time and second or fourth-order differences in space. The method is validated by simulating a low Reynolds number, low Mach number turbulent Poiseuille flow. Various statistical comparisons are made with incompressible experimental and direct simulation data at similar Reynolds numbers, including higher-order statistics and spatial correlations. The results are seen to compare favorably with the incompressible data. A high subsonic Mach number turbulent Poiseuille flow is also simulated for comparison with the low Mach number results at nominally constant Reynolds number. The mean velocity profile is seen to depart from the low Mach number profile, corresponding to an expected dependence of the mean density and temperature profiles on Mach number. The turbulence velocity statistics are found to be reasonably independent of Mach number. Pressure fluctuation statistics are also found to scale with the wall shear stress independently of Mach number, although normalized density and temperature fluctuations increase substantially with Mach number. The density and temperature fluctuations, although small in magnitude, are observed not to be isobarically related. The current simulations have validated the algorithm in the incompressible limit and have demonstrated the ability of the method to simulate high subsonic Mach number flows. The success of these simulations suggests the utility of this method for fundamental research into many turbulent compressible flow problems.

Toward the Large-eddy Simulation of Compressible Turbulent Flows

Toward the Large-eddy Simulation of Compressible Turbulent Flows PDF Author: Institute for Computer Applications in Science and Engineering
Publisher:
ISBN:
Category :
Languages : en
Pages : 46

Book Description
New subgrid-scale models for the large-eddy simulation of compressible turbulent flows are developed and tested based on the Favre- filtered equations of motion for an ideal gas. A compressible generalization of the linear combination of the Smagorinsky model and scale-similarity model, in terms of Favre-filtered fields, is obtained for the subgrid-scale stress tensor. An analogous thermal linear combination model is also developed for the subgrid-scale models are obtained by correlating with the results of direct numerical simulations of compressible isotropic turbulence performed on a 96 cubed grid using Fourier collocation methods. Extensive comparisons between the direct and modeled subgrid-scale fields are provided in order to validate the models. A large-eddy simulation of the decay of compressible isotropic turbulence conducted on a coarse 32 cubed grid is shown to yield results that are in excellent agreement with the fine grid direct simulation. Future application of these compressible subgrid-scale models to the large-eddy simulation of more complex supersonic flows are discussed briefly.

Large Eddy Simulation of Compressible Flow Using a Parallel, Multigrid Driven Algorithm

Large Eddy Simulation of Compressible Flow Using a Parallel, Multigrid Driven Algorithm PDF Author: Eran Arad
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description


Direct and Large-Eddy Simulation I

Direct and Large-Eddy Simulation I PDF Author: Peter R. Voke
Publisher: Springer Science & Business Media
ISBN: 940111000X
Category : Technology & Engineering
Languages : en
Pages : 434

Book Description
It is a truism that turbulence is an unsolved problem, whether in scientific, engin eering or geophysical terms. It is strange that this remains largely the case even though we now know how to solve directly, with the help of sufficiently large and powerful computers, accurate approximations to the equations that govern tur bulent flows. The problem lies not with our numerical approximations but with the size of the computational task and the complexity of the solutions we gen erate, which match the complexity of real turbulence precisely in so far as the computations mimic the real flows. The fact that we can now solve some turbu lence in this limited sense is nevertheless an enormous step towards the goal of full understanding. Direct and large-eddy simulations are these numerical solutions of turbulence. They reproduce with remarkable fidelity the statistical, structural and dynamical properties of physical turbulent and transitional flows, though since the simula tions are necessarily time-dependent and three-dimensional they demand the most advanced computer resources at our disposal. The numerical techniques vary from accurate spectral methods and high-order finite differences to simple finite-volume algorithms derived on the principle of embedding fundamental conservation prop erties in the numerical operations. Genuine direct simulations resolve all the fluid motions fully, and require the highest practical accuracy in their numerical and temporal discretisation. Such simulations have the virtue of great fidelity when carried out carefully, and repre sent a most powerful tool for investigating the processes of transition to turbulence.

Large Eddy Simulations for Compressible Turbulent Jet Flows

Large Eddy Simulations for Compressible Turbulent Jet Flows PDF Author: Nima Tajallipour
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description