Numerical Simulations of Transverse Oscillations of a Finely Structured Solar Flux Tube

In the light of recent CRISP/SST observations we aim to study transverse oscillations of a finely structured flux tube. With the use of PLUTO code, we numerically solve ideal magnetohydrodynamic equations in three-dimensional Cartesian geometry. With a pressure signal we generate a finely structured magnetic flux tube that consists of a central strand and four off-central strands. This flux tube is perturbed by a periodic driver in the azimuthal component of velocity. This driver results in transverse oscillations that propagate upward along these strands. The central strand experiences torsional Alfven waves, while the off-central strands exhibit fast magnetoacoustic kink oscillations. The latter are guided by the off-central strands, which are regions of depression in Alfven speed.