Axial cuts of jet B simulation. Vertical panels: Logarithmic rest-mass density, logarithmic gas pressure, and logarithmic magnetic pressure at t = 560 (R_j/c). Ten tracer contours are overplotted together with the gas pressure, from f ≈ 0 (white to blue) to f = 1 (yellow to white). Horizontal panels: Evolution of the jet velocity at t = 110 (top), t = 360 (middle), and t = 560 (bottom) (R_j/c).