Khujadze, George ; Oberlack, Martin (2004)
DNS and Scaling Laws from the New Symmetry Croups of ZPG Turbulent Boundary Layer.
13th STAB/DGLR Symposium. München (12.11.2002-14.11.2002)
doi: 10.1007/978-3-540-39604-8_43
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
The Lie group approach developed by Oberlack (see [1] and references therein) is used to derive new scaling laws for zero pressure gradient turbulent boundary layer flow. A direct numerical simulation (DNS) is performed for its verification. The approach unifies a large set of scaling laws (invariant solutions) for the mean velocity of stationary parallel turbulent shear flows and extends the work done by Oberlack. From the two-point correlation equations the knowledge of the symmetries allows us to rederive a broad variety of invariant solutions for turbulent flows: the logarithmic law of the wall, an algebraic law, the viscous sublayer, the linear region in the centre of a turbulent Couette flow and in the centre of a rotating channel flow, and a new exponential mean velocity profile that is found in the mid-wake region of flat-plate boundary layers. The present focus is on the exponential law and corresponding new scaling laws for one- and two-point correlations.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2004 |
| Autor(en): | Khujadze, George ; Oberlack, Martin |
| Art des Eintrags: | Bibliographie |
| Titel: | DNS and Scaling Laws from the New Symmetry Croups of ZPG Turbulent Boundary Layer |
| Sprache: | Englisch |
| Publikationsjahr: | 2004 |
| Ort: | Berlin |
| Verlag: | Springer |
| Buchtitel: | New Results in Numerical and Experimental Fluid Mechanics IV Contributions to the 13th STAB/DGLR Symposium Munich, Germany 2002 |
| Reihe: | Notes on numerical fluid mechanics and multidisciplinary design |
| Band einer Reihe: | 87 |
| Veranstaltungstitel: | 13th STAB/DGLR Symposium |
| Veranstaltungsort: | München |
| Veranstaltungsdatum: | 12.11.2002-14.11.2002 |
| DOI: | 10.1007/978-3-540-39604-8_43 |
| Kurzbeschreibung (Abstract): | The Lie group approach developed by Oberlack (see [1] and references therein) is used to derive new scaling laws for zero pressure gradient turbulent boundary layer flow. A direct numerical simulation (DNS) is performed for its verification. The approach unifies a large set of scaling laws (invariant solutions) for the mean velocity of stationary parallel turbulent shear flows and extends the work done by Oberlack. From the two-point correlation equations the knowledge of the symmetries allows us to rederive a broad variety of invariant solutions for turbulent flows: the logarithmic law of the wall, an algebraic law, the viscous sublayer, the linear region in the centre of a turbulent Couette flow and in the centre of a rotating channel flow, and a new exponential mean velocity profile that is found in the mid-wake region of flat-plate boundary layers. The present focus is on the exponential law and corresponding new scaling laws for one- and two-point correlations. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) |
| Hinterlegungsdatum: | 20 Nov 2008 08:26 |
| Letzte Änderung: | 15 Nov 2024 08:53 |
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