Entropy evolution of a 1.3 × 10¹⁵ M_⊙ mass non-cool-core cluster, a 1.6 × 10¹⁵ M_⊙ cool-core cluster, a 1.6 × 10¹³ M_⊙ size group, and a 0.91 × 10¹² M_⊙ halo, from left to right. The black circle indicates the virial radius of each object. The box lengths are scaled to ten times the virial radius for the clusters and 40 times the virial radius for the groups or galaxies with a slice thickness of 1 Mpc/h for all images.