\begin{slide}{Couches limites}

\vskip 0.4cm

Couche limite thermique
$$
\delta_{th}\approx 1.7 h \mbox{Ra}^{-\frac{1}{3}}.$$

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Couche d'Ekman
$$\Delta \approx \sqrt{\frac{\nu}{\Omega}}.$$

\end{slide}

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\overlays{1}{%
\begin{slide}{Conclusions}
\vskip 0.2cm

\begin{minipage}{\linewidth}
{\small
{\em A partir des ph\'enom\`enes de dissolution-cristallisation,
le mod\`ele pr\'edit:}

\vskip 0.4cm

\hskip -0.5cm $\bullet$ \hskip 0.12cm
une rugosit\'e de petites \'echelles \`a la fronti\`ere noyau-manteau.
\vskip 0.3cm 

\hskip -0.5cm $\bullet$ \hskip 0.12cm
Une distance caract\'eristique d'infiltration (``{\em mush}'').
\vskip 0.3cm 

\hskip -0.5cm $\bullet$ \hskip 0.12cm
Des ondulations \`a l'\'echelles d\'ecam\'etrique.
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}
\end{minipage}
\end{slide}
}


