Nevin Manimala Statistics

Controllable particle migration in liquid crystal flows

Soft Matter. 2022 Sep 3. doi: 10.1039/d2sm00707j. Online ahead of print.


We observe novel positional control of a colloidal particle in microchannel flow of a nematic liquid crystal. Lattice Boltzmann simulations show multiple equilibrium particle positions, the existence and position of which are tunable using the driving pressure, in direct contrast to the classical Segré-Silberberg effect in isotropic liquids. In addition, particle migration in nematic flow occurs an order of magnitude faster. These new equilibria are determined through a balance of elastic forces, hydrodynamic lift and drag as well as order-flow interactions through the defect structure around the particle.

PMID:36056713 | DOI:10.1039/d2sm00707j

By Nevin Manimala

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