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Complex multicomponent fluids that undergo liquid-liquid phase separation continue to attract interest as model systems for fluid-templated assembly of mesostructured soft materials. The in- terplay of phase behavior, fluid dynamics, and interfacial thermodynamics in these systems gives rise to a class of so-called soft interface-dominated materials with features such as interfacial as- sembly and kinetically arrested phase morphologies. One particular example of kinetically arrested liquid mixtures are interfacially jammed emulsion gels (bijels) that emerge due to colloidal jamming during spinodal decomposition, resulting in an out-of-equilibrium liquid morphology with gel-like properties [1].

Computational modeling can help gain a fundamental understanding of the structure and dy- namics of complex fluids and soft matter [2, 3]. We present hybrid Lattice Boltzmann and Molecular Dynamics simulations of binary fluid mixtures with anisotropic suspended particles. If the particles possess a magnetic dipole moment, external magnetic fields can be used to manipulate the coarsening and jamming phenomena in bijels. Our simulations demonstrate the effect of magnetic fields on the dynamics of domain coarsening and indicate that the resulting bincontinuous morphology becomes anisotropic. These effects could be leveraged for the design of liquid templates for fabrication of porous membranes and fibers for filtration and separation technologies.

Host: Christoph Junghans (CCS-7)