Fig. 1.

(A) Schematic diagram of micro-shock wave generation from the polymer tube shows the initiation of ignition of the polymer tube by a spark generated by electrodes, the explosive coating undergoing combustion, the combustion flame front traveling at 2,000 m/s, and the micro-shock wave emanating from the open end of the polymer tube. (B) Sequential schlieren images of the micro-shock wave propagation from the open-end polymer tube. (C) Diagram showing pictorial views of the fluid jet delivery system before and after firing. dia, diameter. (D) Prototype model of the needleless delivery device.