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Near field acoustic streaming jet

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Figure

FIG. 1: Experimental set-up, view from the side. The origin of the Cartesian frame is set at the middle of the transducer plane surface: x-axis coincides with the propagation direction, y and z axis are respectively horizontal and vertical.
FIG. 2: Plots of the phase isocontours of the acoustic wave, in the near field at (a) x = 100 mm and (b) x = 150 mm, and in the far field at (c) x = 274 mm (L f ) and (d) x = 549 mm (2L f ).
FIG. 3: Velocity vector maps in the xy horizontal plane including the acoustic beam axis.
FIG. 5: Horizontal transverse profiles of the normalized experimental acoustic intensity (black dashed lines), the normalized experimental velocity at P = 2 W (blue open squares), 4 W (pink open circles) and 8 W (green stars), and the normalized numerical
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