Interactions and pattern formation in a macroscopic magnetocapillary SALR system of mermaid cereal

Interactions and pattern formation in a macroscopic magnetocapillary SALR system of mermaid cereal

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Abstract kicker pro comp 10 When particles are deposited at a fluid interface they tend to aggregate by capillary attraction to minimize the overall potential energy of the system.In this work, we embed floating millimetric disks with permanent magnets to introduce a competing repulsion effect and study their pattern formation in equilibrium.The pairwise energy landscape of two disks is described by a short-range attraction and long-range repulsion (SALR) interaction potential, previously documented in a number of microscopic condensed matter systems.Such competing interactions enable a variety of pairwise equilibrium states, including the possibility of baseball scoreboards for sale a local minimum energy corresponding to a finite disk spacing.Two-dimensional (2D) experiments and simulations in confined geometries demonstrate that as the areal packing fraction is increased, the dilute repulsion-dominated lattice state becomes unstable to the spontaneous formation of localized clusters, which eventually merge into a system-spanning striped pattern.

Finally, we demonstrate that the equilibrium pattern can be externally manipulated by the application of a supplemental vertical magnetic force that remotely enhances the effective capillary attraction.