Turbulent-wake calculations with an eddy-viscosity model.

Inouye, Mamoru; Marvin, J. G.; Sheaffer, Y. S.

doi:10.2514/3.6559

Cited by 6 publications

(2 citation statements)

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“…On the computational side the flat-plate flow, and others, have been addressed numerically by Cebeci, Thiele, Williams and Stewartson [17] using a set of classical boundary-layer equations and the Cebeci-Smith [18] turbulence model, modified for the wake part of the calculation. Other related computations of interest are by Inouye, Marvin and Sheaffer [19], Cebeci, Stewartson and Whitelaw [20], Bradshaw [21] and Hoffman and Ny [22], for instance, with further studies being listed in the references above.…”

Section: Introductionmentioning

confidence: 99%

The turbulent boundary layer and wake of an aligned flat plate

Neish

Smith

1988

J Eng Math

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A theoretical study of the turbulent boundary layer and symmetric wake of an aligned flat plate is described. A specific turbulence model is taken throughout, namely the Cebeci-Smith one, although at the high Reynolds numbers of interest the wake results are found subsequently to be influenced hardly at all by the precise details of the model, so that there is a ready generalization. The two-tiered wake implied by the analysis is rather different from the two-tiered boundary layer. The inner tier of the wake is thicker than the boundary layer's inner tier and, associated with this, the "logarithmic" zone present in the boundary layer upstream is absent in the wake, being replaced by a "cuspidal" zone just outside the inner-wake tier due to the reduction in shear stresses. Local interactive regions near the trailing edge show how the erosion of the logarithmic behaviour takes place relatively fast, being virtually complete on entry into the full wake. The agreement between the theory, experiments and previous computations for the boundary layer and full wake is found to be good quantitatively as well as qualitatively, encouraging the use of the present approach in other contexts such as turbulent separation.

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Section: Introductionmentioning

confidence: 99%

The turbulent boundary layer and wake of an aligned flat plate

Neish

Smith

1988

J Eng Math

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“…Flat-plate and wake flows are addressed numerically by Cebeci et al (1979), among others, using a set of classical boundary-layer equations and the Cebeci-Smith (1974) turbulence model, modified for the wake part of the calculation. Other related studies of interest are by Inouye, Marvin & Sheaffer (1972) Ramaprian, Pate1 & Sastry (1982) and Hoffman & Ny (1978).…”

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confidence: 99%

On turbulent separation in the flow past a bluff body

Neish

Smith

1992

J. Fluid Mech.

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The basic model problem of separation as predicted by the time-mean boundary-layer equations is studied, with the Cebeci-Smith model for turbulent stresses. The changes between laminar and turbulent flow are investigated by means of a turbulence ‘factor’ which increases from zero for laminar flow to unity for the fully turbulent regime. With an attached-flow starting point, a small increase in the turbulence factor above zero is found to drive the separation singularity towards the trailing edge or rear stagnation point for flow past a circular cylinder, according to both computations and analysis. A separated-flow starting point is found to produce analogous behaviour for the separation point. These findings lead to the suggestion that large-scale separation need not occur at all in the fully turbulent regime at sufficiently high Reynolds number; instead, separation is of small scale, confined near the trailing edge. Comments on the generality of this suggestion are presented, along with some supporting evidence from other computations. Further, the small scale involved theoretically has values which seem reasonable in practical terms.

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