Abstract
The large structures on the boundary of a two-dimensional submerged jet were examined. In the first experiment, a jet of a 100 ppm aqueous polyacrylamid solution was fed into pure water (P/W). In the second experiment, the jet as well as the ambient fluid were pure water (W/W), whereas in the third experiment, polymer solution (W/P) was in the ambient only.
The large structures were found to be of the same size for all three experiments. The spread-angle was lowest for P/W and highest for W/P. These effects are attributed to a strong flow which stretches the polymer molecules in the mixing layer.
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Hinch, E.J., Mechanical models of dilute polymer solutions in stron flows.Phys. Fluids 20 (1977) S22.
Gyr, A., Bewersdorff, H.-W., Hoyer, K. and Tsinober, A., An investigation of possible mechanisms of heterogeneous drag reduction in pipe and channel flows. In: So, R.M.C. et al. (eds.),Near-Wall Turbulent Flows. Elsevier (1993) p. 679.
Hoyer, K., Bewersdorff H.-W., Gyr, A. and Tsinober A., Studies on the mechanism of heterogeneous drag reduction. In:XI Congr. Rheol., Brussels 1992, Th. and Appl. Rheology, Elsevier (1992) p. 183.
Berman, N.S. and Tan, H., Two-component Laser Doppler Velocimeter studies of submerged jets of dilute polymer solutions.AIChE J. 31 (1985) 208.
Kwade, M., Beeinflussung der Turbulenzstruktur in der ebenen Mischschicht zweier Ströme durch Polymerzusätze.Rheol. Acta 21 (1982) 120.
Küchemann, D. and Weber, J.,ZAMM 45 (1965) 457.
Maskell, E.C. In:Proc. 3rd. Congr. Int Counc. Aero. Sci. (1964) p. 737.
Bark, F.H. and Tinoco, H., Stability of plane Poiseuille flow of a dilute suspension of slender fibres.J. Fluid Mech. 87 (1978) 321.
Moore, D.W. and Saffman, P.G., The density of organized vortices in a turbulent mixing layer.J. Fluid Mech. 69 (1975) 465.
Lamb, H.,Hydrodynamics. Cambridge University Press (1932).
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Gyr, A. Effects of polymer additives on the large scale structure of a two-dimensional submerged jet. Appl. Sci. Res. 56, 13–18 (1996). https://doi.org/10.1007/BF02282919
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DOI: https://doi.org/10.1007/BF02282919