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An extensive numerical investigation was carried out to assess the influences of shear-thinnin g intensity and Reynolds number on the steady flow of power law fluids within an impinging jet cell, and in particular, on the pressure loss and the size and strength of the recirculation region formed along the sloping surfaces of the cell. Some comparisons with experiment are reported. The size and strength of this recirculation increases with Reynolds number and three- dimensional effects due to the finite aspect ratio of the geometry are reported. The end walls are shown to eliminate the recirculation in their vicinity and create a spiralling motion inside the recirculation. Shear-thinning enhances these effects. There is also a linear dependence between the pressure loss coefficient and the Reynolds number studied.

Numerical Investigation of the Flow Field in Confined Impinging Jets of Non Newtonian Fluids