Size-dependent particle migration and trapping in three-dimensional microbubble streaming flows

Andreas Volk, Massimiliano Rossi, Bhargav Rallabandi, Christian J. Kähler, Sascha Hilgenfeldt, Alvaro Marin*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Acoustically actuated sessile bubbles can be used as a tool to manipulate microparticles, vesicles, and cells. In this work, using acoustically actuated sessile semicylindrical microbubbles, we demonstrate experimentally that finite-sized microparticles undergo size-sensitive migration and trapping toward specific spatial positions in three dimensions with high reproducibility. The particle trajectories are successfully reproduced by passive advection of the particles in a steady three-dimensional streaming flow field augmented with volume exclusion from the confining boundaries. For different particle sizes, this volume exclusion mechanism leads to three regimes of qualitatively different migratory behavior, suggesting applications for separating, trapping, and sorting of particles in three dimensions.

Original languageEnglish
Article number114201
JournalPhysical review fluids
Volume5
Issue number11
DOIs
Publication statusPublished - 19 Nov 2020

Fingerprint

Dive into the research topics of 'Size-dependent particle migration and trapping in three-dimensional microbubble streaming flows'. Together they form a unique fingerprint.

Cite this