should decrease as $C$ increases. In the results of WL, the expansion rate is characterized via the parameter $K$ (their equation 8) where $$r_s = \left[\frac{25(\gamma + 1) K E}{16 \pi \rho_1}\right]^{1/5} t^{2/5},
    \label{eq:rs}$$ $r_s$ is the shock radius, $E$ is the explosion energy, $\gamma = 5/3$, and $\rho_1$ is the ambient intercloud density (0.25 cm$^{-3}$ for our runs). WL lists values for $K/K(\mathrm{Sedov})$ as a function of $\tau$, the ratio of cloud evaporation time to remnant age. $K(\mathrm{Sedov}) = 1.528$ is the $K$ value for the case of no clouds. We can invert equation \[eq:rs\] to determine the effective value of K for our runs. Doing this we find that K varies considerably over a typical run though it flattens at late times. For most of our runs, K defined this way starts high, $> 2$, but ends near 0.9. The WL model predicts, given a value of $\tau$ of $\sim 5 - 10$ (see discussion below) and $C = 10$, $K \sim 0.816 - 1.149$. This is in fairly good agreement with our results. K can also be alternatively be defined using WL’s equation (6) as $$K = \frac{4 \pi \rho_1 r_s^3 v_s^2}{(\gamma + 1)E}.$$ With this definition, 