Fundamental Study of Electromagnetic Actuated Needle-Free Jet Injection


  • Gittiphong Sripanagul
  • Anirut Matthujak





Electromagnetic actuator, Needle-free jet injection, velocity, impact pressure, Polyacrylamide gel


The objective of this paper is to preliminarily study the needle-free jet injection by electromagnetic actuator. The jets were generated by electromagnetic actuator, being designed and manufactured for this study. Effects of orifice diameter of the nozzle, travelling distance, voltage and liquid volume on jet velocity and impact pressure were investigated by laser beam interruption method and PVDF pressure sensor respectively. Moreover, the evolution of jet penetration during the injection into 20% Polyacrylamide gel was visualized by high-speed video camera. It was found that the electromagnetic actuator with the orifice diameter of 0.2 mm at travelling distance of 5 mm and voltage of 500 Volt at all liquid volumes can be applied for needle-free jet injection. The introductory channel as well as circular       dispersion was obviously observed seen from the evolution of jet penetration into 20% Polyacrylamide gel.




[1] Jiang. H., et al., Investigation of rock cutting dust formation and suppression using water jets during mining. Powder Technology, 2017. 307: p. 99-108.

[2] Lee, K.H. et al., An experimental study on the spray behavior and fuel distribution of GDI injectors using the entropy analysis and PIV method. Fuel, 2004. 83(8): p. 971-980.

[3] Horst G. R. et al., Jet-cutting Supported by High Frequency Current: New Technique for Hepatic Surgery. WORLD Journal of SURGERY, 1997. 21(3): p. 259-260.

[4] Dunnen. S. D., & Tuijthof, G.J.M., The influence of water jet diameter and bone structural properties on the efficiency of pure water jet drilling in porcine bone. Mechanical sciences, 2014. 5(2): p. 53-58.

[5] Taberner. A. et al., Needle-free jet injection using real-time controlled linear Lorentz-force actuators. Medical Engineering & Physics, 2012. 34(9): p. 1228-1235.

[6] Shergold. A. O. et al., The penetration of a soft solid by a liquid jet, with application to the administration of a needle-free injection. Journal of Biomechanics, 2006. 39(14): p. 2593-2602.

[7] Stachowiak. J.C. et al., Piezoelectric control of needle-free transdermal drug delivery. Journal of Controlled Release, 2007. 124(2): p. 88-97.

[8] Bowden, F.P., & Brunton, J.H., Damage to solids by liquid impact at supersonics speeds. 1958. p. 873-875.

[9] Matthujak, A. et al., High-speed liquid jet formation by impact acceleration method. Shock wave, 2007. 16 (6): p. 405-419.

[10] Grinspan. A. S., & Gnanamoorthy. R., Impact force of low velocity liquid droplets measured using piezoelectric PVDF film. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2010. 356(3): p. 162-168

[11] Baxter. S. J. et al., Jet injection into polyacrylamide gels: investigation of jet injection mechanics. Journal of Biomechanics, 2004. 37(8): p. 1181-1188.

View Full Article: