Typical parent granule issued from the numerical simulation, at the origin of the formation of a large TFG. From left to right: time t = 0 (birth), 3, 6, 10 (growing phase), 13, 17, 21, 24 (explosion), and 30 min. The FOV is 9.6 Mm × 9.6 Mm. Line 1: intensity segmentation (the exploding granule is shown in blue); line 2: emerging intensity (in gray); line 3: vertical velocity: redshifts (downflow) and blueshifts (upflow); line 4: horizontal velocity module (in gray); line 5: horizontal velocity divergence (red for converging flow, blue for diverging flow). The arrows indicate the location of the exploding granule.