Young sun simulation in 3D, 64³ mesh. Panel a: surfaces of constant velocity along with velocity arrows. Panel b: slices along the equator and perpendicular to the equator. Shown is velocity magnitude (color coded) along with velocity arrows (arrows color coded according to velocity magnitude). Bottom panels: radial profiles of v_rms (panel c, logarithmic scale) and of v_rms split into radial and tangential components (panel d, total v_rms also shown). Solid lines show time averages, the range (minimum to maximum) is indicted by dotted lines.