\begin{table}%t2
\caption{\label{table2}Time-averaged results for the forced models. Data is averaged spatially and temporally over the second half of the simulation.}              
%\centering
\small                                     
\begin{tabular}{c|ccc|ccc|ccc}          
\hline \hline                         
%&&&&&&&&& \\[-8pt]
& \multicolumn{3}{c|}{Mass fraction} & \multicolumn{3}{c|}{Volume fraction}
&\multicolumn{3}{c}{rms velocity [$\kms$]}  \\ 
\raisebox{1.5ex}[0cm][0cm]{Method}
& H & G & F & H & G & F & H & G & F  \\
\hline
ZEUS    &    0.62 & 0.27 & 0.12 & 0.062 & 0.18 & 0.75 & 2.0 & 2.1 & 2.2 \\
NIRVANA  &   0.45 & 0.42 & 0.13 & 0.039 & 0.25 & 0.71 & 2.3 & 2.4 & 2.3 \\
\hline
\end{tabular}
\end{table}