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Turbulent Poiseuille flow with wall transpiration

Vigdorovich, Igor ; Oberlack, Martin
Hrsg.: Hanjalic, K. ; Nagano, Y. ; Jakirlic, S. (2009)
Turbulent Poiseuille flow with wall transpiration.
In: 6th International Symposium on Turbulence, Heat and Mass Transfer (THMT-09). Rome, Italy, September 14-18, 2009
Buchkapitel, Bibliographie

Kurzbeschreibung (Abstract)

An incompressible, pressure-driven, fully developed turbulent flow between two parallel walls, with an extra constant transverse velocity component, is considered. A closure condition is formulated which relates the shear stress to the first and the second derivatives of the longitudinal mean velocity. The closure condition is derived without invoking any special hypotheses on the nature of turbulent motion, only taking advantage of the fact that the flow depends on a finite number of governing parameters. The problem is solved by the method of matched asymptotic expansions at high values of the logarithm of the Reynolds number based on the friction velocity. A limit transpiration velocity is obtained such that the shear stress at the injection wall vanishes, while the maximum point on the velocity profile approaches the suction wall. In this case, a sublayer near the suction wall appears where the mean velocity is proportional to the square root of the distance from the wall. A friction law is found, which makes it possible to describe the relation between the wall shear stress, the Reynolds number, and the transpiration velocity by a single function of one variable. A velocity defect law, which generalizes the classical law for the core region in a channel with impermeable walls to the case of transpiration, is also established. In similarity variables, the mean velocity profiles across the whole channel width outside viscous sublayers can be described by a one-parameter family of curves. The theoretical results obtained are in good agreement with available DNS data.

Typ des Eintrags: Buchkapitel
Erschienen: 2009
Herausgeber: Hanjalic, K. ; Nagano, Y. ; Jakirlic, S.
Autor(en): Vigdorovich, Igor ; Oberlack, Martin
Art des Eintrags: Bibliographie
Titel: Turbulent Poiseuille flow with wall transpiration
Sprache: Englisch
Publikationsjahr: 2009
Ort: New York, Wallingford (UK)
Verlag: Begell House, Inc
Buchtitel: 6th International Symposium on Turbulence, Heat and Mass Transfer (THMT-09). Rome, Italy, September 14-18, 2009
Kurzbeschreibung (Abstract):

An incompressible, pressure-driven, fully developed turbulent flow between two parallel walls, with an extra constant transverse velocity component, is considered. A closure condition is formulated which relates the shear stress to the first and the second derivatives of the longitudinal mean velocity. The closure condition is derived without invoking any special hypotheses on the nature of turbulent motion, only taking advantage of the fact that the flow depends on a finite number of governing parameters. The problem is solved by the method of matched asymptotic expansions at high values of the logarithm of the Reynolds number based on the friction velocity. A limit transpiration velocity is obtained such that the shear stress at the injection wall vanishes, while the maximum point on the velocity profile approaches the suction wall. In this case, a sublayer near the suction wall appears where the mean velocity is proportional to the square root of the distance from the wall. A friction law is found, which makes it possible to describe the relation between the wall shear stress, the Reynolds number, and the transpiration velocity by a single function of one variable. A velocity defect law, which generalizes the classical law for the core region in a channel with impermeable walls to the case of transpiration, is also established. In similarity variables, the mean velocity profiles across the whole channel width outside viscous sublayers can be described by a one-parameter family of curves. The theoretical results obtained are in good agreement with available DNS data.

Zusätzliche Informationen:

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.620

Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy)
16 Fachbereich Maschinenbau
Hinterlegungsdatum: 02 Sep 2011 13:15
Letzte Änderung: 17 Feb 2014 08:46
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