caa a22 4500 475797043 CHVBK 20180406123727.0 cr unu---uuuuu 170329e20001101xx s 000 0 eng 10.1007/PL00001530 doi (NATIONALLICENCE)springer-10.1007/PL00001530 Jet flows in non-Newtonian fluids [Elektronische Daten] [H. Stehr, W. Schneider] Abstract.: Plane and axisymmetric, laminar, submerged jet flows of non-Newtonian power-law fluids, issuing from an orifice in a wall, are investigated for large Reynolds numbers. In contrast to previous investigations,the interaction between the jet flow and the induced flow is taken into account using matched asymptotic expansions combined with a two-scaling technique. The following four effects, occuring at sufficiently low values of the power-law index, are analyzed:¶• Very large mass entrainment into the jet.¶• Non-negligible viscosity in the induced outer flow.¶• Slow, but substantial, variation of the momentum flow in the jet with increasing distance from the orifice.¶• Spreading of the jet into a recirculatory flow (eddy). The analytical results are compared with experimental data taken from the literature. For the purpose of further comparisons, and in order to extend the investigation into flow regimes where the asymptotic expansion ceases to be valid, the full equations of motion are solved numerically by means of a finite element code. Birkhäuser Verlag, Basel,, 2000 Key words. Jet flows, non-Newtonian fluids, flows induced by jets, matched asymptotic expansions, multiple scaling nationallicence Stehr H. Institute of Fluid Mechanics and Heat Transfer, Technical University of Vienna, Wiedner Hauptstraße 7, A-1040 Wien, Austria, AT aut Schneider W. Institute of Fluid Mechanics and Heat Transfer, Technical University of Vienna, Wiedner Hauptstraße 7, A-1040 Wien, Austria, AT aut https://doi.org/10.1007/PL00001530 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00001530 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stehr H. Institute of Fluid Mechanics and Heat Transfer, Technical University of Vienna, Wiedner Hauptstraße 7, A-1040 Wien, Austria, AT aut NATIONALLICENCE 700 1- Schneider W. Institute of Fluid Mechanics and Heat Transfer, Technical University of Vienna, Wiedner Hauptstraße 7, A-1040 Wien, Austria, AT aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer