\begin{table}%t1
 \caption{Set of parameters for the initial magnetic flux tube in the runs
 described in the paper.
\label{tbl-1}}
\vspace*{-2.5mm}
 %\centerline
{
\begin{tabular}{lcccc}
\hline\hline\\[-3mm]
 Label & $B_{0}$ (G) & $\beta_0$ & $\Phi_{0} \ (10^{19}$~Mx) & Entropy prescription \\
\hline
S1 & 7550 & 4 & 3.8 & Horizontal tube \\
S2 & 7550 & 4 & 3.8 & $\Omega$-loop \\
 \hline
\end{tabular}}
{\it Note:} $B_0$ and $\beta_0$ refer to the values at the tube
axis, located $1.8$~Mm\\ below the photosphere.
\end{table}