Line integral convolution visualisation of the entropy behaviour indicating the presence of eddies within the second core. Shown here is the inner 0.5 au of 3000 au collapsing cloud cores with different masses of 5 M_⊙ (top), 10 M_⊙ (middle), and 20 M_⊙ (bottom). The plots are shown at 128 years, 91.4 years, and 86.4 years after the second core formation, for the 5 M_⊙, 10 M_⊙, and 20 M_⊙ cases, respectively.