\usepackage{graphicx}
\begin{table}[htb]
\centering
\begin{tabular}{|c|c|c}
\hline
Shape && R\textsubscript{hyd} \\
\hline
circle
& \begin{minipage}{0.3\textwidth}
\includegraphics[width=2cm, height= 2cm]{images/circle}
\end{minipage}
& $\frac{8\mu L}{\pi r^{4}}$ \\[1cm]
ellipse
& \begin{minipage}{0.3\textwidth}
\includegraphics[width=2cm, height= 2cm]{images/ellipse}
\end{minipage}
&$\frac{4\mu L}{\pi a^{4}} \frac{1+(b/a)^{2}}{(b/a}^{3}$ \\[1cm]
\end{tabular}
\end{table}
I have a problem with the size of equations. It gets compressed and readability is gone. Also the figure couldnot be centered vertically.
