Studies on three-dimensional viscous jets

Sforza, Pasquale M.; Steiger, Martin H.; Trentacoste, N.

doi:10.2514/6.1965-49

Cited by 11 publications

(13 citation statements)

References 11 publications

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“…This feature is analogous to that encountered in the description of threedimensional free jets as demonstrated by Sforza et al 13 Furthermore, irregularities in 'the spanwise distribution of the mean streamwise velocity for the conventional three-dimensional wall jets have been observed, similar to the mean velocity irregularities in three-dimensional fiee jets reported by Trentacoste and Sforza14. These irregularitie6 in the mean velocity profile, manifested as local excesses and defects, pose a difficulty in specifying what region of a wall jet flow field generated by a long, slender slot is even quasi-twocdimensional.…”

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confidence: 66%

A study of three-dimensional, incompressible, turbulent wall jets

Sforza

Herbst

1970

AIAA Journal

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SUMMARYThis report presents an experimental investigation of the mean properties of turbulent, three-dimensional, incompressible air jets issuing into a quiescent air ambient from various rectangular orifices parallel to, and at the surface of, a flat plate. An analytical approach to estimate the shear stress distribution at the plate is also presented.The flow field of a three-dimensional wall jet is found to be characterized by three discinct regions in the axis velocity decay.From the results obtained it is concluded that for three-dimensional wall jets the maximum velocity in the flow in the near field exhibits a decay rate dependent on orifice geometry, while far downstream of the jet exit it decays at the same ra 4 .e as that in a radial wall jet flow field independent of orifice geometry.Furthermore, it is shown that the growth of the mixing layer normal to the plate is apparently independent oZ orifice shape while the near field spanwise growth is affected by initial geometry.

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confidence: 66%

A study of three-dimensional, incompressible, turbulent wall jets

Sforza

Herbst

1970

AIAA Journal

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“…Studies of three-dimensional axisymmetric jets (8) show that the jet essentially maintains its velocity close to the exit velocity for a downstream distance of several orifice diameters. Even in the presence of a plane wall, this region of nearly potential flow extends about 2 orifice diameters downstream (9 …”

Section: Methodsmentioning

confidence: 99%

Force Required to Detach Conidia of Helminthosporium maydis

Aylor¹

1975

Plant Physiol.

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The force required to break the conidium-conidiophore attachment in Helminthosporium "taydis was measured by centrifugation and by a small jet of air. The force which removed half the spores from their stalks was found by both methods to be about 1 x 10-dynes. The corresponding speed of the air jet was about 10 m/sec. Although spores are removed over a range of applied force, most of this spread is accounted for by the variation in spore size. Therefore, the apparent strength of the attachment of conidia to conidiophores, though relatively large, is surprisingly uniform.

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“…e(t-"-) =o ("-'" (9 It is noted that Eq. (39) is in accord with the Linear Mean Square Estimation (LMSE) closure ).…”

Section: Scalar Diffusionmentioning

confidence: 99%

“…Results of early investigations of three-dimensional (3D) rectangular jets have been reported in Refs. [9][10][11], and of elliptic jets in Refs. [12][13][14][15].…”

mentioning

confidence: 99%

DNS, LES and Stochastic Modeling of Turbulent Reacting Flows

Givi¹

1994

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Studies on three-dimensional viscous jets

Cited by 11 publications

References 11 publications

A study of three-dimensional, incompressible, turbulent wall jets

A study of three-dimensional, incompressible, turbulent wall jets

Force Required to Detach Conidia of Helminthosporium maydis

DNS, LES and Stochastic Modeling of Turbulent Reacting Flows

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