Transition from turbulent to coherent flows in confined three-dimensional active fluids

Kun Ta Wu, Jean Bernard Hishamunda, Daniel T.N. Chen, Stephen J. DeCamp, Ya Wen Chang, Alberto Fernández-Nieves, Seth Fraden, Zvonimir Dogic

Research output: Contribution to journalArticle

113 Scopus citations

Abstract

Transport of fluid through a pipe is essential for the operation of macroscale machines and microfluidic devices. Conventional fluids only flow in response to external pressure. We demonstrate that an active isotropic fluid, composed of microtubules and molecular motors, autonomously flows through meter-long three-dimensional channels.We establish control over the magnitude, velocity profile, and direction of the self-organized flows and correlate these to the structure of the extensile microtubule bundles. The inherently three-dimensional transition from bulk-turbulent to confined-coherent flows occurs concomitantly with a transition in the bundle orientational order near the surface and is controlled by a scale-invariant criterion related to the channel profile.The nonequilibrium transition of confined isotropic active fluids can be used to engineer self-organized soft machines.

Original languageEnglish
Article numbereaal1979
JournalScience
Volume355
Issue number6331
DOIs
StatePublished - Mar 24 2017

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