Featured Liquid Crystal Picture Art of the Month
Trajectories of whirl turbulent flows created in a homeotropic aligned smectic A liquid crystal sample in an a.c. electric field (observed in crossed polarizers), a phenomenon of electrohydrodynamic convection (EHD). The loop patterns are formed by tiny focal conic domains. This flow motion can drag the pre-blended colloidal particles moving around with the convective rolls above the threshold voltage and stops momentarily on the removal of the field – see the movie.
Textural patterns by hydrodynamics in LCs are typical representations of the complexity of anisotropic fluids. The spirals in the image simply remind me the sky of the well-known painting “Starry Night” by Van Gogh, which is often used by physicists to demonstrate “turbulence” in fluidic systems.
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