Microrheology close to an equilibrium phase transition
- Reinhardt, Johannes Department of Physics, University of Fribourg, Switzerland
- Scacchi, Alberto Department of Physics, University of Fribourg, Switzerland
- Brader, Joseph M. Department of Physics, University of Fribourg, Switzerland
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14.04.2014
Published in:
- The Journal of Chemical Physics. - 2014, vol. 140, no. 14, p. 144901
English
We investigate the microstructural and microrheological response to a tracer particle of a two-dimensional colloidal suspension under thermodynamic conditions close to a liquid-gas phase boundary. On the liquid side of the binodal, increasing the velocity of the (repulsive) tracer leads to the development of a pronounced cavitation bubble, within which the concentration of colloidal particles is strongly depleted. The tendency of the liquid to cavitate is characterized by a dimensionless “colloidal cavitation” number. On the gas side of the binodal, a pulled (attractive) tracer leaves behind it an extended trail of colloidal liquid, arising from downstream advection of a wetting layer on its surface. For both situations the velocity dependent friction is calculated.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 210160
- DOI 10.1063/1.4870497
- Persistent URL
- https://folia.unifr.ch/unifr/documents/303687
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