Jet Injection into Porous Media

 Water jet injected via a syringe into a porous, particulate medium

Water jet injected via a syringe into a porous, particulate medium

Micro-needles are a promising means for delivering vaccines and medicine to patients due to their painless nature. However, their application is limited by their small penetration depth. In order to overcome this limitation we have turned to pairing micro-needles with high speed jets. 

Our investigation begins by studying the characteristic behavior of high-speed liquid jets flowing through porous, particulate media. Such flows result in the creation of a cavity in the media, which is affected by the jet’s diameter, speed, and acceleration, as well as the particles’ size and wetting properties. Analyzing the results of these experiments will provide guidance for optimizing the design of efficient micro-needle injectors/syringes.