Ullmann, Sebastian ; Löbig, Stefan ; Lang, Jens
Hrsg.: Janicka, J. ; Sadiki, Amsini ; Schäfer, Michael ; Heeger, Christof (2013)
Adaptive Large Eddy Simulation and Reduced-Order Modeling.
In: Flow and Combustion in Advanced Gas Turbine Combustors
doi: 10.1007/978-94-007-5320-4_12
Buchkapitel, Bibliographie
Kurzbeschreibung (Abstract)
The quality of large eddy simulations can be substantially improved through optimizing the positions of the grid points. LES-specific spatial coordinates are computed using a dynamic mesh moving PDE defined by means of physically motivated design criteria such as equidistributed resolution of turbulent kinetic energy and shear stresses. This moving mesh approach is applied to a three-dimensional flow over periodic hills at Re=10,595 and the numerical results are compared to a highly resolved LES reference solution. Further, the applicability of reduced-order techniques to the context of large eddy simulations is explored. A Galerkin projection of the incompressible Navier--Stokes equations with Smagorinsky sub-grid filtering on a set of reduced basis functions is used to obtain a reduced-order model that contains the dynamics of the LES. As an alternative method, a reduced-order model of the un-filtered equations is calibrated to a set of LES solutions. Both approaches are tested with POD and CVT modes as underlying reduced basis functions.
| Typ des Eintrags: | Buchkapitel |
|---|---|
| Erschienen: | 2013 |
| Herausgeber: | Janicka, J. ; Sadiki, Amsini ; Schäfer, Michael ; Heeger, Christof |
| Autor(en): | Ullmann, Sebastian ; Löbig, Stefan ; Lang, Jens |
| Art des Eintrags: | Bibliographie |
| Titel: | Adaptive Large Eddy Simulation and Reduced-Order Modeling |
| Sprache: | Englisch |
| Publikationsjahr: | 2013 |
| Ort: | Dordrecht |
| Verlag: | Springer Netherlands |
| Buchtitel: | Flow and Combustion in Advanced Gas Turbine Combustors |
| Reihe: | Fluid Mechanics and Its Applications |
| Band einer Reihe: | 102 |
| Veranstaltungsort: | Dordrecht |
| DOI: | 10.1007/978-94-007-5320-4_12 |
| Kurzbeschreibung (Abstract): | The quality of large eddy simulations can be substantially improved through optimizing the positions of the grid points. LES-specific spatial coordinates are computed using a dynamic mesh moving PDE defined by means of physically motivated design criteria such as equidistributed resolution of turbulent kinetic energy and shear stresses. This moving mesh approach is applied to a three-dimensional flow over periodic hills at Re=10,595 and the numerical results are compared to a highly resolved LES reference solution. Further, the applicability of reduced-order techniques to the context of large eddy simulations is explored. A Galerkin projection of the incompressible Navier--Stokes equations with Smagorinsky sub-grid filtering on a set of reduced basis functions is used to obtain a reduced-order model that contains the dynamics of the LES. As an alternative method, a reduced-order model of the un-filtered equations is calibrated to a set of LES solutions. Both approaches are tested with POD and CVT modes as underlying reduced basis functions. |
| Fachbereich(e)/-gebiet(e): | Exzellenzinitiative Exzellenzinitiative > Exzellenzcluster Exzellenzinitiative > Graduiertenschulen Exzellenzinitiative > Graduiertenschulen > Graduate School of Computational Engineering (CE) 04 Fachbereich Mathematik 04 Fachbereich Mathematik > Numerik und wissenschaftliches Rechnen 04 Fachbereich Mathematik > Numerik und wissenschaftliches Rechnen > Large-Eddy Simulation with Adaptive Grids for Meteorological Applications 04 Fachbereich Mathematik > Numerik und wissenschaftliches Rechnen > Model Reduction for Large-Eddy Simulation Exzellenzinitiative > Exzellenzcluster > Center of Smart Interfaces (CSI) |
| Hinterlegungsdatum: | 04 Okt 2017 07:29 |
| Letzte Änderung: | 20 Apr 2023 07:32 |
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