Two-component Navier-Stokes computational model of viscous sublayer turbulence

Chapman, Dean R.; Kuhn, G. D.

doi:10.2514/6.1981-1024

Cited by 11 publications

(9 citation statements)

References 26 publications

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“…Nevertheless, Schumann's assumption of U-Tw correlation is reasonable and can be improved by including a space-time shift. Chapman & Kuhn (1981) propose a two-dimensional wall-layer structure retaining only the trans verse spatial variation. They use detailed experimental data to set the length scales and phase relations of the velocity at the outer edge of the layer and obtain good agreement with experiment for the internal layer structure.…”

Section: Boundary and Initial Conditionsmentioning

confidence: 99%

Numerical Simulation of Turbulent Flows

Moin

1984

Annu. Rev. Fluid Mech.

772

296

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Section: Boundary and Initial Conditionsmentioning

confidence: 99%

Numerical Simulation of Turbulent Flows

Moin

1984

Annu. Rev. Fluid Mech.

772

296

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“…The results outlined above have prompted the representation of the time-varying flow in the viscous wall region by "slender body turbulence" or the ''21/, D model" used by Hatziavramidis and Hanratty (1972) and by Chapman and Kuhn (1981). The main simplifications are the neglect of derivatives in the flow direction and the assumption that the flow at y o can be described with two scales, one characterizing the wall streaks (A = 100) and the other, the influence of large outer flow eddies (Nikolaides, 1984;Lyons et al, 1988;Finnicum and Hanratty, 1988).…”

Section: Conceptual Model Suggested By Laboratory Measurementsmentioning

confidence: 99%

Turbulence‐producing eddies in the viscous wall region

1989

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A computer simulation of turbulent flow in a channel is u s e d to d e t e c t flow p a t t e r n s related to t h e production of Reynolds stress. It is found t h a t quadrant 2 a n d quadrant 4 events possess a s t r e a k y structure in t h e viscous wall region a n d t h a t t h e s e e v e n t s can be best understood b y examining t h e velocity field in t h e y-z plane. Large turbulence production in t h e viscous wall region is found to occur in updrafts a n d downdrafts a s s o c i a t e d with c l o s e d eddies. T h e s e e d d i e s , on a v e r a g e , h a v e a spanwise dimension of 50 wall units a n d a s t r e a m w i s e dimension of 400-450 wall units. They are often seen t o originate from small a t t a c h e d e d d i e s a t t h e wall.

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“…Although, from the scaling of profiles of average velocity, it might be anticipated that the structure of the stress producing eddies in the viscous wall layer at Re t ¼ 950 would be the same as found for smaller Reynolds numbers, it is important to document this conjecture. Chapman and Kuhn [10], Lyons et al [27], Nikolaides [37], Finnicum and Hanratty [11] and Hanratty [14] developed models for the viscous wall layer which show that a significant fraction of the energy of the turbulent velocity fluctuations is contributed by the interaction of large outer flow eddies with the wall. More recently Iwamoto et al [20] used a DNS at Re t ¼ 2; 320 to map streamwise velocity fluctuations in the x-z plane at y þ w ¼ 11.…”

Section: The Viscous Wall-layermentioning

confidence: 99%

Flow Visualization of Superbursts and of the Log-Layer in a DNS at % MathType!Translator!2!1!AMS LaTeX.tdl!TeX -- AMS-LaTeX! % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX % garmWu51MyVXgatuuDJXwAK1uy0HwmaeHbfv3ySLgzG0uy0Hgip5wz % aebbnrfifHhDYfgasaacH8qrps0lbbf9q8WrFfeuY-Hhbbf9v8qqaq % Fr0xc9pk0xbba9q8WqFfea0-yr0RYxir-Jbba9q8aq0-yq-He9q8qq % Q8frFve9Fve9Ff0dmeaabaqaciGacaGaaeqabaWaaeWaeaaakeaaci % GGsbGaaiyzamaaBaaaleaacqaHepaDaeqaaOGaeyypa0JaaGyoaiaa % iwdacaaIWaaaaa!3E8E

Mito

Hanratty

Zandonade

et al. 2007

Flow Turbulence Combust

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This paper uses direct numerical simulations (DNS) of turbulent flow in a channel at Re t ¼ 950 (Del Álamo, Jiménez, Zandonade, Moser J Fluid Mech 500:135-144, 2004) to provide a picture of the turbulent structures making large contributions to the Reynolds shear stress. Considerable work of this type has been done for the viscous wall region at smaller Re t , for which a log-layer does not exist. Recent PIV measurements of turbulent velocity fluctuations in a plane parallel to the direction of flow have emphasized the dominant contribution of large scale structures in the outer flow. This prompted Hanratty and Papavassiliou (The role of wall vortices in producing turbulence. In: Panton, R.L. (ed) Self-sustaining Mechanism of Wall Turbulence. Computational Mechanics Publications, Southampton, pp. 83-108, 1997) to use DNS at Re t ¼ 150; 300 to examine these structures in a plane perpendicular to the direction of flow. They identified plumes which extend from the wall to the center of a channel. The data at Re t ¼ 950 are used to explore these results further, to examine the structure of the log-layer, and to test present notions about the viscous wall layer.

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Two-component Navier-Stokes computational model of viscous sublayer turbulence

Cited by 11 publications

References 26 publications

Numerical Simulation of Turbulent Flows

Numerical Simulation of Turbulent Flows

Turbulence‐producing eddies in the viscous wall region

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