Time evolution of the simulation with Σ₀ = 50 M_⊙ pc⁻² and speed of sound c_s = 3 km s⁻¹, as an example of strong accretion. Top: simulation reaching the highest final black hole mass of all the simulations carried out for this work. During the switch-on phase an inner disk mass of more than 10⁸   M_⊙ is reached. This leads immediately to strong accretion of more than 0.1 M_⊙ yr⁻¹ right from the beginning. Bottom: simulation initially exhibiting strong fragmentation, before changing to a gravitational turbulent accretion mode. A laminar inner disk is never observed.