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Finite-volume optimal large-eddy sim...

Zandonade, Paulo Seiji Kumon.

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Finite-volume optimal large-eddy simulation.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Finite-volume optimal large-eddy simulation./
Author:	Zandonade, Paulo Seiji Kumon.
Description:	123 p.
Notes:	Adviser: Robert D. Moser.
Contained By:	Dissertation Abstracts International68-07B.
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3270065
ISBN:	9780549098485

Finite-volume optimal large-eddy simulation.
Zandonade, Paulo Seiji Kumon.

Finite-volume optimal large-eddy simulation. - 123 p.

Adviser: Robert D. Moser.

Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007.

An optimal finite-volume large-eddy simulation (LES) model for isotropic turbulence is developed. This modeling approach is based on the approximation of the ideal LES by a stochastic estimate of the fluxes in a finite-volume representation of the Navier-Stokes equation. Stochastic estimation of these fluxes allows for the simultaneous treatment of the Navier-Stokes equations, discretization and subgrid effects, yielding a compact yet accurate scheme for the LES of isotropic turbulence.

ISBN: 9780549098485Subjects--Topical Terms:

783786
Engineering, Mechanical.

Finite-volume optimal large-eddy simulation.
LDR:02971nam 2200313 a 45 001 946077
005 20110523
008 110523s2007 ||||||||||||||||| ||eng d
020 $a 9780549098485
035 $a (UMI)AAI3270065
035 $a AAI3270065
040 $a UMI $c UMI
100 1 $a Zandonade, Paulo Seiji Kumon. $3 1269487
245 1 0 $a Finite-volume optimal large-eddy simulation.
300 $a 123 p.
500 $a Adviser: Robert D. Moser.
500 $a Source: Dissertation Abstracts International, Volume: 68-07, Section: B, page: 4560.
502 $a Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007.
520 $a An optimal finite-volume large-eddy simulation (LES) model for isotropic turbulence is developed. This modeling approach is based on the approximation of the ideal LES by a stochastic estimate of the fluxes in a finite-volume representation of the Navier-Stokes equation. Stochastic estimation of these fluxes allows for the simultaneous treatment of the Navier-Stokes equations, discretization and subgrid effects, yielding a compact yet accurate scheme for the LES of isotropic turbulence.
520 $a Optimal finite-volume LES models are initially developed using velocity correlations computed from direct numerical simulation (DNS) data. These DNS-based models are used to verify the feasibility of the optimal finite-volume models and to guide the choice of stencil geometry and model inputs. The most promising models with smallest a priori variations are tested in actual simulations and the results compared with those for filtered DNS and the dynamic Smagorinsky model. The a posteriori performance of the optimal finite-volume LES models, evaluated by the energy spectrum and third-order structure function, is superior to that of the dynamic Smagorinsky model on a coarse grid.
520 $a To remove the dependence of the optimal finite-volume LES models on DNS data, theory- and dynamic-based methods for computing the velocity correlations are formulated. Using both dynamic methods and Kolmogorov theoretical expressions provides closure to the stochastic estimation equations without use of any DNS data. Results with these dynamic optimal finite-volume LES models were once again comparable with the dynamic Smagorinsky results.
520 $a Finally, the dynamic optimal finite-volume LES model is applied to more a more complex flow, the temporally-growing shear layer. The results obtained with dynamic optimal finite-volume LES models are comparable with the DNS results of Rogers & Moser (1994), at a fraction of the cost. One expects the results from the shear layer to be representative of the performance of the optimal finitevolume LES models in bulk-flow turbulence.
590 $a School code: 0090.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Physics, Fluid and Plasma. $3 1018402
690 $a 0548
690 $a 0759
710 2 $a University of Illinois at Urbana-Champaign. $3 626646
773 0 $t Dissertation Abstracts International $g 68-07B.
790 $a 0090
790 1 0 $a Moser, Robert D., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3270065