Cinmemj: Cinmemj moved page Draft Samper 992172721 to Guasch Codina 2013a

2019-10-07T11:55:16Z

Cinmemj moved page Draft Samper 992172721 to Guasch Codina 2013a

Cinmemj at 11:55, 7 October 2019

2019-10-07T11:55:00Z

Cinmemj: Created page with "==1 Title, abstract and keywords

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-==1 Title, abstract and keywords<!-- Your document should start with a concise and informative title. Titles are often used in information-retrieval systems. Avoid abbreviations and formulae where possible. Capitalize the first word of the title.
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+Abstract Numerical simulations have proved that Variational Multiscale Methods (VMM) perform well as pure numerical large eddy simulation (LES) models. In this paper we focus on the orthogonal subgrid scale (OSS) finite element method and make an analysis of the statistical behavior of its stabilization terms in the quasi static approximation. This is done by resorting to results from classical statistical fluid mechanics concerning two point velocity, pressure and combined correlation functions of various orders. Given a fine enough mesh with characteristic element size h in the inertial subrange of a turbulent flow, it is shown that the rate of transfer of subgrid kinetic energy provided by the OSS stabilization terms does not depend on h and that it equals the molecular physical dissipation rate (up to a dimensionless constant that only depends on the finite element shapes) for a proper redesign of the standard parameters of the formulation. This is a noteworthy fact taking into account that the subgrid stabilization terms do not arise from physical considerations, but from the mathematical necessity to allow equal interpolation for the pressure and velocity fields, as well as to control convection. Therefore, the obtained results contribute somehow to the line of reasoning supporting that pure numerical approaches (i.e., without introducing additional physical models) could probably suffice in the LES simulation of turbulent flows.
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← Older revision	Revision as of 11:55, 7 October 2019
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Guasch Codina 2013a - Revision history

Cinmemj: Cinmemj moved page Draft Samper 992172721 to Guasch Codina 2013a

Cinmemj at 11:55, 7 October 2019

Cinmemj: Created page with "==1 Title, abstract and keywords