Visualization of the kinematic regime of the Archontis dynamo

Visualization of strong (weak) magnetic (velocity) structures (dark and light isosurfaces correspondingly) in the kinematic regime of the Archontis dynamo. Streamlines (coming from the up-right corner) converge first to an a-type stagnation point (center of the box), and then diverge and are twisted around weak velocity tubes as soon as they reach their neighbourhood.