Cut through the loop at the apex (cross section perpendicular to the loop axis). (a) Temperature; (b) Electron density; (c) Magnitude of the velocity perpendicular to the loop axis; (d) emission in the 211 Å channel of AIA, (e) Axial component of the velocity; (f) Axial component of the Poynting flux; (g) Axial component of the current density, (h) emission as seen with the Al-poly filter of XRT. The black arrows illustrate the horizontal velocity field. The yellow box highlights the location of a vortex with enhanced temperature and density. The snapshot was taken at t = 41.02 min. See Sect. 3.3.