Cloud mass evolution as a function of the distance from the center, for models A, B, and C (see Figure 2). In all cases, the cloud starts with a mass of 5 × 10² M_⊙, but in model A it continuously loses its mass and slowly evaporates into the background medium due to hydrodynamical interactions with the hot wind, while in the other two models it initially increases its mass due to the cooling of the mixing layers.