Small-scale EMF, ℰ, averaged over center regions for simulations of edge-on collisions (left) and simulations with the impact parameter α_b = 15° (right). Top row: EMF normalized with respect to its value at t = 500 Myr. Bottom row: ℰ relative to $\overline{\mathbf{v}}\times \overline{\mathbf{B}}$ (see Eq. (17)) averaged over center regions for the same simulations as in the top row. The corresponding magnetic field evolution is shown in Fig. 6.