V001 / JSI / T1


In a paper, published in Physical Review X, Simon Čopar, Jure Aplinc, Žiga Kos, Slobodan Žumer and Miha Ravnik ( Department of Physics UL-FMF, Department of Solid-state Physics IJS), present the first numerical study of the topology of three-dimensional active nematic turbulence in a spherical confinement. Simulations were performed using a mesoscopic model of active nematic fluids, which are most commonly used to describe biological systems driven by internal conversion of stored energy (usually chemical) into motion. The chaotic motion in the active turbulence was explained by elementary topological events that affect defect lines appearing in such systems. Additionally, a coupling of surface and bulk dynamics through defects was demonstrated.