A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Microrheology close to an equilibrium phase transition
Tekijät: Reinhardt, J.; Scacchi, A.; Brader, J. M.
Kustantaja: AMER INST PHYSICS
Kustannuspaikka: MELVILLE
Julkaisuvuosi: 2014
Journal: Journal of Chemical Physics
Tietokannassa oleva lehden nimi: JOURNAL OF CHEMICAL PHYSICS
Lehden akronyymi: J CHEM PHYS
Artikkelin numero: 144901
Vuosikerta: 140
Numero: 14
Sivujen määrä: 10
ISSN: 0021-9606
eISSN: 1089-7690
DOI: https://doi.org/10.1063/1.4870497
Tiivistelmä
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. (C) 2014 AIP Publishing LLC.
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. (C) 2014 AIP Publishing LLC.
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