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Issue 22, 2009
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Shear rheology of amphiphilic cubic liquid crystals from large-scale kinetic lattice–Boltzmann simulations

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Abstract

We investigate the rheological characteristics of ternary amphiphilic gyroid, diamond and primitive cubic phases under applied Couette flow simulated using a kinetic lattice–Boltzmann model and periodic Lees–Edwards boundary conditions. The simulated rheological response of the cubic phases is compared to experimental observations in lyotropic liquid crystals. We relate the variations in the non-Newtonian response and deformation under strain in these cubic phases to their triply bicontinuous cubic morphologies as well as to the differences in the interaction parameters between the three species present in the amphiphilic system. The large system sizes allow simulation of multiple domains which elucidate the correlation between the evolution of the defect texture and the change in the stress field of the cubic phase under applied Couette flow.

Graphical abstract: Shear rheology of amphiphilic cubic liquid crystals from large-scale kinetic lattice–Boltzmann simulations

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Publication details

The article was received on 19 Jun 2009, accepted on 18 Sep 2009 and first published on 08 Oct 2009


Article type: Paper
DOI: 10.1039/B911884E
Citation: Soft Matter, 2009,5, 4446-4463
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    Shear rheology of amphiphilic cubic liquid crystals from large-scale kinetic lattice–Boltzmann simulations

    R. S. Saksena and P. V. Coveney, Soft Matter, 2009, 5, 4446
    DOI: 10.1039/B911884E

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