6533b872fe1ef96bd12d3894
RESEARCH PRODUCT
Self-assembly and rheology of dipolar colloids in simple shear studied using multi-particle collision dynamics.
Dmitry ZablotskyHans J. HerrmannElmars Blumssubject
ChemistryPhysical system02 engineering and technologyGeneral ChemistryMechanics021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesUniversality (dynamical systems)Simple shearDipoleMolecular dynamicsRheologyComputational chemistry0103 physical sciencesMagnetic nanoparticlesMulti-particle collision dynamics010306 general physics0210 nano-technologydescription
Magnetic nanoparticles in a colloidal solution self-assemble in various aligned structures, which has a profound influence on the flow behavior. However, the precise role of the microstructure in the development of the rheological response has not been reliably quantified. We investigate the self-assembly of dipolar colloids in simple shear using hybrid molecular dynamics and multi-particle collision dynamics simulations with explicit coarse-grained hydrodynamics, conduct simulated rheometric studies and apply micromechanical models to produce master curves, showing evidence of the universality of the structural behavior governed by the competition between the bonding (dipolar) and erosive (thermal and/or hydrodynamic) stresses. The simulations display viscosity changes across several orders of magnitude in fair quantitative agreement with various literature sources, substantiating the universality of the approach, which seems to apply generally across vastly different length scales and a broad range of physical systems.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-09-08 | Soft matter |