Activity induced rigidity of liquid droplets.

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Title (deu)

Speaker / Lecturer

Hamid Kellay

LOMA, CNRS

Description (deu)

Encapsulating active Janus particles within a drop renders it more resistant to deformation. This drop is deformed under the action of an extensional flow. Such deformation is primarily resisted by the drop interfacial tension. When the particles are active under the action of laser illumination, the deformation decreases signaling an increase in effective tension or Laplace pressure. This increase is attributed to the activity of the particles. Our results using numerous drop sizes, particle number densities, and active velocities show that the obtained increase agrees surprisingly well, over an extended range, with a standard expression for the pressure engendered by an ensemble of active particles, proposed years ago but not tested yet in three dimensions.

Keywords (deu)

Transport PropertiesSoft Matter Systems

Subject (eng)

ÖFOS 2012 -- 103 -- Physics, Astronomy

Type (eng)

lecture

Language

[eng]

Persistent identifier

https://phaidra.univie.ac.at/o:2063400

Date created

2024-04-04