Fig. 8

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Comparison of the general solutions (full or dash/dotted lines) to the analytical solution (straight dashed line) in terms of in (a) and (c) and
in (b) and (d) for changes in flow fraction F in (a) and (b) and changes in oil viscosity in (c) and (d). All solutions fall on the same straight line at low dimensionless number (high rates) which scale the data.