Discontinuous thinning in active microrheology of soft complex matter.
Phys Rev E
; 94(6-1): 062610, 2016 Dec.
Article
em En
| MEDLINE
| ID: mdl-28085442
ABSTRACT
Employing theory and numerical simulations, we demonstrate discontinuous force thinning due to the driven motion of an external probe in a host medium. We consider two cases an ideal structureless medium (modeling ultrasoft materials such as polymer melts) and a dilute bath of interacting repulsive particles. When the driving of the probe exceeds a critical force, the microviscosity of the medium drops abruptly by about an order of magnitude. This phenomenon occurs for strong attractive interactions between a large probe and a sufficiently dense host medium.
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MEDLINE
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En
Ano de publicação:
2016
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Article