Nguyen, Cat Tuong ; Oberlack, Martin (2022)
Symmetry-Induced High-Moment Turbulent Scaling Laws of a Spatially Evolving Turbulent Round Jet.
12th International Symposium on Turbulence and Shear Flow Phenomena (TSFP12). Osaka, Japan (Online) (July 19 - July 22, 2022)
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
A direct numerical simulation (DNS) of a spatially evolving turbulent round jet has been conducted at Re0 = 3500 in a very large box using a fully turbulent pipe flow as an inlet to analyze classical and new scaling laws from the near up to the far-field. The primary object of this study is to deepen our knowledge on turbulent jet flows employing the symmetry based turbulence theory using the multi-point moment equations (MPME). With the DNS data the scaling laws derived from Lie symmetry analysis are validated and extended up to statistical moments of arbitrary order n. Further investigations show that when fitting the instantaneous moments to a Gaussian function of the normalized radius r/z, the prefactors of the exponents show a linear behavior in n. This suggests the existence of an additional statistical symmetry which, if confirmed, can only be found in the MPME rather than in the Navier-Stokes equations.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Nguyen, Cat Tuong ; Oberlack, Martin |
| Art des Eintrags: | Bibliographie |
| Titel: | Symmetry-Induced High-Moment Turbulent Scaling Laws of a Spatially Evolving Turbulent Round Jet |
| Sprache: | Englisch |
| Publikationsjahr: | 19 Juli 2022 |
| Buchtitel: | Proceedings of the 12th International Symposium on Turbulence and Shear Flow Phenomena (TSFP12) |
| Veranstaltungstitel: | 12th International Symposium on Turbulence and Shear Flow Phenomena (TSFP12) |
| Veranstaltungsort: | Osaka, Japan (Online) |
| Veranstaltungsdatum: | July 19 - July 22, 2022 |
| URL / URN: | http://www.tsfp-conference.org/proceedings/proceedings-of-ts... |
| Kurzbeschreibung (Abstract): | A direct numerical simulation (DNS) of a spatially evolving turbulent round jet has been conducted at Re0 = 3500 in a very large box using a fully turbulent pipe flow as an inlet to analyze classical and new scaling laws from the near up to the far-field. The primary object of this study is to deepen our knowledge on turbulent jet flows employing the symmetry based turbulence theory using the multi-point moment equations (MPME). With the DNS data the scaling laws derived from Lie symmetry analysis are validated and extended up to statistical moments of arbitrary order n. Further investigations show that when fitting the instantaneous moments to a Gaussian function of the normalized radius r/z, the prefactors of the exponents show a linear behavior in n. This suggests the existence of an additional statistical symmetry which, if confirmed, can only be found in the MPME rather than in the Navier-Stokes equations. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) > Numerische Strömungssimulation 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) > Turbulenz- und Verbrennungsforschung |
| Hinterlegungsdatum: | 15 Nov 2022 07:46 |
| Letzte Änderung: | 15 Nov 2022 07:46 |
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