Bioinspired mechanical device generates plasma in water via cavitation

Area of Science:

• Biomimicry
• Plasma Physics
• Fluid Dynamics

Background:

• Nature achieves efficient plasma generation in liquids, notably through snapping shrimp.
• Snapping shrimp utilize cavitation collapse for high pressures, temperatures, and energy focusing.
• Existing artificial plasma generation methods (electrical, acoustic, light) are less efficient than natural processes.

Purpose of the Study:

• To develop a bioinspired mechanical device replicating the plasma generation mechanism of the snapping shrimp.
• To investigate the efficiency of this bioinspired method compared to conventional techniques.

Main Methods:

• Additive manufacturing utilized micro-X-ray computed tomography of a snapping shrimp claw.
• A custom spring fixture was designed for precise actuation of the mechanical claw.
• The device was engineered to match the shrimp's cavitation number and Reynolds number for water jet generation.

Main Results:

• The bioinspired device successfully generated light emission and shock waves, confirming plasma formation.
• Observed phenomena indicate successful replication of the snapping shrimp's plasma generation technique.
• The device demonstrated higher efficiency in plasma generation compared to other artificial methods.

Conclusions:

• A bioinspired mechanical device can effectively mimic natural plasma generation in liquids.
• This biomimetic approach offers a more efficient alternative to current artificial plasma generation technologies.
• Further research into bioinspired cavitation and plasma physics holds significant potential.