Near-wall dynamics of single cavitation bubbles imaged by total internal reflection fluorescence.

ABSTRACT: This study introduces total internal reflection fluorescence (TIRF) as a method for investigating the dynamics of a single laser-induced cavitation bubble in water within a thin layer near a solid surface. TIRF, supported by a planar waveguide, was employed to image cavitation bubble collapses near the liquid-solid interface at 50 thousand frames per second (kfps). Simultaneously, traditional side-view background illumination at 150 kfps captured the bubble dynamics. Dilution series and thickness estimation were conducted to determine interfering fluorescence signal contributions. The results confirm that most fluorescence is excited by the evanescent field rather than surface scattering or bulk scattering. The lifecycle of cavitation bubbles with moderate non-dimensional stand-off distanc

SUBMITTER: Wang F 

PROVIDER: S-EPMC12446976 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature