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Using the Matlab script and plotting Y-coordinate approximate locations at which U=U_center/2 (determined by examining values read in to Matlab) gives the half width variation . It R(x)(1/2). The half width appears to increase approximately linearly along X.

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An additional step is to plot the self-similar profiles U/U_center of the axial velocity U (scaled by the centerline velocity U_Center) vs radial distance (scaled by the half width) at various X locations, using the same exported data. The profiles appear to be self similar, although at X values closer to the inlet they will not match exactly due to the additional entrainment effects.

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