3-D views of the radial velocity (v_r, in units of km s⁻¹) and number density (n, in units of cm⁻³) at the heliospheric inner boundary during the CME insertion, for the two simulations performed. (a) v_r for the cone (spherical) CME model, (b) n for the cone (spherical) CME model, (c) v_r for the spheroidal CME model, (d) n for the spheroidal CME model. The area where the CME is being inserted (v_r = 800 km s⁻³, n = 600 cm⁻³) is visible as the red (orange) patch on the left (right).