Bio-inspired apparatus to produce luminescent cavitation in a rigid walled chamber

A mechanical device inspired by the sudden rotational motion of the pistol shrimp claw was developed. The apparatus consists of a limb with a V-shaped end, which fits into a socket forming a cylindrical compression chamber. Air bubbles of different sizes and in different positions inside the chamber were seeded to study their shape evolution in liquids when subjected to pressure pulses induced by the limb closure. Non-spherical shape dynamics, micro jets and photon emission were observed during bubble collapse. The proposed mechanism represents a low-cost technology useful in the study of cavitation near rigid boundaries of diverse geometries.

Experimental data on limb motion and bubble dynamics were obtained by processing videos taken with a high-speed camera. Light signals were acquired with a photomultiplier and force signals were acquired using PVDF piezoelectric sensors. 

Numerical data describing limb motion were obtained by numerically solving a torque balance model, while radial dynamics curves were obtained by solving the Rayleigh-Plesset equation.

Data files are presented in two types of extension .opj (and .opju) that can be opened and analyzed in OriginPro software and also .xlsx that can be opened and analyzed with Microsoft Excel. The name of each file corresponds to the Figure number used in the article. 

Two notebooks created in Mathematica are made available. One of them was used to simulate the dynamics of clamp closure and the other to estimate the pressure pulse generated during limb closure. The versions of these files are not the most up-to-date, 
but they contain all the information necessary to reproduce the results presented in the article.