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Abstract: We analyze a model of mutually-propelled filaments suspended in atwo-dimensional solvent. The system undergoes a mean-field isotropic-nematictransition for large enough filament concentrations and the nematic orderparameter is allowed to vary in space and time. We show that the interplaybetween non-uniform nematic order, activity and flow results in spatiallymodulated relaxation oscillations, similar to those seen in excitable media. Inthis regime the dynamics consists of nearly stationary periods separated by-bursts- of activity in which the system is elastically distorted and solventis pumped throughout. At even higher activity the dynamics becomes chaotic.



Author: L. Giomi, L. Mahadevan, B. Chakraborty, M. F. Hagan

Source: https://arxiv.org/







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