Dewetting Fingering Instability in Capillary Suspensions: Role of Particles and Liquid Bridges.

ABSTRACT: This study investigates the fingering instability that forms during the stretching of capillary suspensions with and without added nanoparticles. The dewetting process is observed using a transparent lifted Hele-Shaw cell. The liquid bridge is stretched under constant acceleration, and the resulting instability patterns are recorded using two high-speed cameras. Finger-like structures, characteristic of the Saffman-Taylor instability, are observed. The total length of the dendrites and the intersecting number of branches are quantified. We reveal the roles of microparticles, nanoparticles, and the secondary liquid during the fingering instability. The addition of microparticles to pure liquid enhanced finger length due to increased particle interactions and nucleation sites for bubbles. Th

SUBMITTER: Liu L 

PROVIDER: S-EPMC11887438 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature