Profiles of a collapsing SFDM halo with an initial Gaussian density contrast, m = 30 eV, g = 10⁻⁵ eV⁻², L = 100 kpc, and T/T_c = 0.1. A thermal counterflow develops and the growth of entropy perturbations is at first suppressed. This also gives a slight decrease in the ratio T/T_c, and hence the superfluid fraction, since f_s = ρ_s/ρ = 1 − (T/T_c)^3/2. As the critical velocity is reached, entropy is generated, and T/T_c increases.