Scaling of average X-ray emission ⟨L_X⟩ with unsigned surface flux Φ. Each data point represents an average for one of the model runs with different unsigned surface magnetic flux listed in Table 1. As a reference for the magnetic flux, Φ_ref, we choose the magnetic flux of the least active setup, run 1B (cf. Table 1). The bars represent the standard deviation of L_X in time. The red lines are power-law fits to the data. The blue lines show the analytic power-law relations based on the RTV scalinglaws; see Sects. 5, 6.3 and 6.4.