  We use stochastic rotation dynamics to examine the dynamics of the ejection
of an initially strongly confined flexible polymer from a spherical capsid with
and without hydrodynamics. The results obtained using SRD are compared to
similar Langevin simulations. Inclusion of hydrodynamic modes speeds up the
ejection but also allows the part of the polymer outside the capsid to expand
closer to equilibrium. This shows as higher values of radius of gyration when
hydrodynamics are enabled. By examining the waiting times of individual polymer
beads we find that the waiting time $t_w$ grows with the number of ejected
monomers $s$ as a sum of two exponents. When $\approx 63 \%$ of the polymer has
ejected the ejection enters the regime of slower dynamics. The functional form
of $t_w$ vs $s$ is universal for all ejection processes starting from the same
initial monomer densities. Inclusion of hydrodynamics only reduces its
magnitude. Consequently, we define a universal scaling function $h$ such that
the cumulative waiting time $t = N_0 h(s/N_0)$ for large $N_0$. Our
unprecedently precise measurements of force indicate that this form for
$t_w(s)$ originates from the corresponding force towards the pore decreasing
super exponentially at the end of the ejection. Our measured $t_w(s)$ explains
the apparent superlinear scaling of the ejection time with the polymer length
for short polymers. However, for asymptotically long polymers $t_w(s)$ predicts
linear scaling.
