Experimental Investigation of the Three-Dimensional Boundary Layer on a Rotating Disk

Littell, Howard Steven; Eaton, John K.

doi:10.1007/978-3-642-77674-8_27

Cited by 5 publications

(16 citation statements)

References 7 publications

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“…Both ͑1͒ and ͑2͒ are consistent with the previously studied threedimensional turbulent boundary layers in equilibrium. [1][2][3][4][5][6] In the present paper, we mainly focus on the conditionally averaged velocity and discuss the characteristics of the Reynolds-shear-stress-producing eddies in the 3DTBL flow. The measurement location is fixed at rϭ0.421 m (Re r ϭ5.0 ϫ10 5 ) and yϭ1.64 mm (y ϩ Ӎ90), which is selected to match the experimental condition of Littell and Eaton (Re r ϭ6.5ϫ10 5 and y ϩ Ӎ115͒.…”

Section: Resultsmentioning

confidence: 99%

“…The measurement location is fixed at rϭ0.421 m (Re r ϭ5.0 ϫ10 5 ) and yϭ1.64 mm (y ϩ Ӎ90), which is selected to match the experimental condition of Littell and Eaton (Re r ϭ6.5ϫ10 5 and y ϩ Ӎ115͒. 1,2 The two-point velocity correlation coefficient is then defined as R i j ͑x 3 ͒ϭ u i Ј͑r គ,y,t͒u j Ј͑r គϩx 3 e 3 ,y,t͒…”

Section: Resultsmentioning

confidence: 99%

“…The y-location is nearly the same as that in Littell and Eaton. 1,2 Transition in the free rotating disk flow occurs over a range of the Reynolds number from 290 000 to 310 000 for a clean disk and from 270 000 to 280 000 for a disk with a single, three-dimensional roughness element. 16 In the present study hot-wire signals showed that transition was completed within Re r Ϸ300 000 ͑where rϷ0.330 m and ⍀ϭ407 rpm͒, which is very consistent with Littell and Eaton 1,2 and Chiang and Eaton.…”

Section: Experimental Facilities and Techniquesmentioning

confidence: 99%

“…1,2 Note that ejection and sweep events belong to the first and third quadrants, respectively, in this flow.…”

Section: ͑3͒mentioning

confidence: 99%

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On the modification of the near-wall coherent structure in a three-dimensional turbulent boundary layer on a free rotating disk

1998

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An experimental study has been performed on a shear-driven three-dimensional turbulent boundary layer in equilibrium over a rotating disk. The objective of the present study is to investigate the modification of the near-wall coherent structure in the three-dimensional turbulent boundary layer developed in this flow. Two-point velocity measurements are carried out with two X-wire probes which are aligned in the local wall-parallel mean velocity direction, which show that strong asymmetries exist in the velocity cross-correlation coefficient in the spanwise direction, and also in the conditionally averaged velocity signals in the vicinity of a strong ejection or sweep, as was shown by Littell and Eaton ͓J. Fluid Mech. 266, 175 ͑1994͔͒. However, a quadrant analysis reveals that the Reynolds-shear-stress-producing eddies are nearly symmetric in the spanwise direction and those asymmetries are attributed to the changes in the negative-Reynolds-shear-stress-producing motions which have less relation to the streamwise coherent structures.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Facilities and Techniquesmentioning

confidence: 99%

“…1,2 Note that ejection and sweep events belong to the first and third quadrants, respectively, in this flow.…”

Section: ͑3͒mentioning

confidence: 99%

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On the modification of the near-wall coherent structure in a three-dimensional turbulent boundary layer on a free rotating disk

1998

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“…Pellé and Harmand (2007) performed measurements over the rotor (in the rotor/stator configuration), using a technique based on infrared thermography. A very detailed experimental investigation of the turbulent flow around a single heated rotating disk was performed by Elkins and Eaton (2000) and Littell and Eaton (1991).…”

Section: Introductionmentioning

confidence: 99%

Investigation of transitional and turbulent heat and momentum transport in a rotating cavity

Tuliszka‐Sznitko

Majchrowski

Kiełczewski

2012

International Journal of Heat and Fluid Flow

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Wall-modelled large-eddy simulation of three-dimensional turbulent boundary layer in a bent square duct

Hayat

Park

2023

J. Fluid Mech.

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We conduct wall-modelled large-eddy simulation (WMLES) of a pressure-driven three-dimensional turbulent boundary layer developing on the floor of a bent square duct to investigate the predictive capability of three widely used wall models, namely, a simple equilibrium stress model, an integral non-equilibrium model, and a partial differential equation (PDE) non-equilibrium model. The numerical results are compared with the experiment of Schwarz & Bradshaw (J. Fluid Mech., vol. 272, 1994, pp. 183–210). While the wall-stress magnitudes predicted by the three wall models are comparable, the PDE non-equilibrium wall model produces a substantially more accurate prediction of the wall-stress direction, followed by the integral non-equilibrium wall model. The wall-stress direction from the wall models is shown to have separable contributions from the equilibrium stress part and the integrated non-equilibrium effects, where how the latter is modelled differs among the wall models. The triangular plot of the wall-model solution reveals different capabilities of the wall models in representing variation of flow direction along the wall-normal direction. In contrast, the outer LES solution is unaffected by the type of wall model used, resulting in nearly identical predictions of the mean and turbulent statistics in the outer region for all the wall models. This is explained by the vorticity dynamics and the inviscid skewing mechanism of generating the mean three-dimensionality. Finally, the LES solution in the outer layer is used to study the anisotropy of turbulence. In contrast to the canonical two-dimensional wall turbulence, the Reynolds stress anisotropy exhibits strong non-monotonic behaviour with increasing wall distance.

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Experimental Investigation of the Three-Dimensional Boundary Layer on a Rotating Disk

Cited by 5 publications

References 7 publications

On the modification of the near-wall coherent structure in a three-dimensional turbulent boundary layer on a free rotating disk

On the modification of the near-wall coherent structure in a three-dimensional turbulent boundary layer on a free rotating disk

Investigation of transitional and turbulent heat and momentum transport in a rotating cavity

Wall-modelled large-eddy simulation of three-dimensional turbulent boundary layer in a bent square duct

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