Plane and axisymmetric, submerged jet flows of non-Newtonian power-law fluids, issuing from a wall, are investigated in the limit of large effective Reynolds numbers. In contrast to previous investigations, the interaction between jet flow and induced flow, leading to a change of the jet momentum flow, is taken into account using matched asymptotic expansions combined with a two-scaling technique. For plane jets the change of momentum flow within the jet is small of higher order for n > 2/3, but of the order 1 for 1/2 ≤ n ≤ 2/3, with n denoting the power-law index. In the latter range a recirculatory flow region ("eddy") is predicted if the inclination angle between the wall and the jet axis is below some critical value. In the axisymmetric case the change of momentum flow within the jet is small of higher order for n > 1 and of the order 1 for the well-known Newtonian case n = 1. The full equations of motion are also solved numerically using a finite element code.
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