Overview over the simulation box. Top row: Temperature distribution (left) and the emission as it would be seen with the Al-poly filter of the Hinode/XRT X-ray imager at the loop apex (right). Bottom row: Vertical magnetic field at the ⟨τ⟩ = 1 layer at both loop footpoints at s = 0 (left, footpoint A) and s = 50 (right, footpoint B). The arrows show magnitude and direction of the velocity field perpendicular to the loop axis. The yellow and orange rectangles mark the position of the closeups of the footpoints shown in Fig. 2. The magenta contours outline magnetic field concentrations with |B_z|≥1000 G. The snapshot was taken at T = 2.23 min. Data is taken after running the simulation at high resolution for 30 min. See Sect 2 for more details.