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. 2012 Apr 26;134(4):41006–NaN. doi: 10.1115/1.4006404

Fig. 2.

Fig. 2

Mass conservation for cannula infusion with backflow. Radial symmetry was assumed. Q = total flow rate, Qs=flow through the spherical surface, Qc=flow through the cylindrical surface, a=cannula outer radius, r=radial coordinate, z=longitudinal coordinate, and Z=backflow distance.