$//<![CDATA[ \begin{array}{l}\displaystyle {\rm Nu} =\frac{U \cdot L}{\lambda }\end{array} //]]>$

$//<![CDATA[ \begin{array}{l}\displaystyle {\rm Bi} =\frac{U \cdot L}{\lambda }\end{array} //]]>$

$//<![CDATA[ \begin{array}{l}\displaystyle {\rm Pr} = \frac{\nu}{a}\end{array} //]]>$

$//<![CDATA[ \begin{array}{l}\displaystyle {\rm Gr} = \frac{g \, \beta \, \Delta T \, L^3}{\nu^2}\end{array} //]]>$

$//<![CDATA[ \begin{array}{l}\displaystyle {\rm Ra} = {\rm Gr} \cdot {\rm Pr}\end{array} //]]>$

$//<![CDATA[ \begin{array}{l}\displaystyle {\rm Fo} = \frac{a \cdot t}{L^2}\end{array} //]]>$