Large-eddy simulation of round turbulent jets using the Inertial LES method with multifractal subgrid-scale modeling

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Large-eddy simulation of passive scalar mixing by a fully three-dimensional round incompressible turbulent jet is evaluated using the Inertial LES methodology with multifractal subgrid-scale modeling. The Inertial LES approach involves the direct calculation of the inertial term {ovr u{sub i} u{sub j}} in the filtered incompressible Navier-Stokes equation and the scalar flux term {ovr u{sub j} {phi}} in the filtered advection-diffusion equation, using models for the subgrid velocity field u{sup sgs} and the subgrid scalar-concentration field {phi}{sup sgs}. In this work, the models are based on the multifractal structure of the subgrid enstrophy 2Q{sup sgs}(x,t) {triple_bond} {omega}{sup sgs} {center_dot} {omega}{sup ... continued below

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Burton, G January 8, 2007.

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Large-eddy simulation of passive scalar mixing by a fully three-dimensional round incompressible turbulent jet is evaluated using the Inertial LES methodology with multifractal subgrid-scale modeling. The Inertial LES approach involves the direct calculation of the inertial term {ovr u{sub i} u{sub j}} in the filtered incompressible Navier-Stokes equation and the scalar flux term {ovr u{sub j} {phi}} in the filtered advection-diffusion equation, using models for the subgrid velocity field u{sup sgs} and the subgrid scalar-concentration field {phi}{sup sgs}. In this work, the models are based on the multifractal structure of the subgrid enstrophy 2Q{sup sgs}(x,t) {triple_bond} {omega}{sup sgs} {center_dot} {omega}{sup sgs} and scalar-dissipation {chi}{sup sgs} (x,t) {triple_bond} D{del}{phi}{sup sgs} {center_dot} {del}{phi}{sup sgs} fields, respectively. No artificial viscosity or diffusivity constructs are applied and no explicit dealiasing is performed. Numerical errors are controlled by the application of an adaptive backscatter limiter. The present work summarizes the initial evaluation of the Inertial LES approach in the context of the round turbulent jet, including examinations of jet self-similarity and the scale-to-scale distribution of kinetic and scalar energy in the jet far field. These inquiries confirm that the Inertial LES method accurately recovers the large scale structure of this complex turbulent shear flow.

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PDF-file: 8 pages; size: 1.2 Mbytes

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  • Presented at: International Workshop on the Physics of Compressible Turbulent Mixing, Paris, France, Jul 17 - Jul 21, 2006

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  • Report No.: UCRL-CONF-227154
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 902263
  • Archival Resource Key: ark:/67531/metadc884383

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  • January 8, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 29, 2016, 6:12 p.m.

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Burton, G. Large-eddy simulation of round turbulent jets using the Inertial LES method with multifractal subgrid-scale modeling, article, January 8, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc884383/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.