Modeling the behavior of confined colloidal particles under shear flow.
basic_science · Level V
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- Record sourced from PubMed, PMID 25265241.
- Also identified by DOI 10.1039/c4sm01812e.
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Abstract
We investigate the behavior of colloidal suspensions with different volume fractions confined between parallel walls under a range of steady shears. We model the particles using molecular dynamics (MD) with full hydrodynamic interactions implemented through the use of a lattice-Boltzmann (LB) fluid. A quasi-2d ordering occurs in systems characterized by a coexistence of coupled layers with different densities, order, and granular temperature. We present a phase diagram in terms of shear and volume fraction for each layer, and demonstrate that particle exchange between layers is required for entering the disordered phase.