A1 Refereed original research article in a scientific journal

Microrheology close to an equilibrium phase transition




AuthorsReinhardt, J.; Scacchi, A.; Brader, J. M.

PublisherAMER INST PHYSICS

Publishing placeMELVILLE

Publication year2014

JournalJournal of Chemical Physics

Journal name in sourceJOURNAL OF CHEMICAL PHYSICS

Journal acronymJ CHEM PHYS

Article number 144901

Volume140

Issue14

Number of pages10

ISSN0021-9606

eISSN1089-7690

DOIhttps://doi.org/10.1063/1.4870497(external)


Abstract
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.



Last updated on 2025-27-01 at 18:27