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OGS
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van Genuchten model: non-wetting phase
k{rel}= (1 - S_e)^{1/3} (1 - S_e^{1/m})^{2m}
with
S_e=\frac{S^w-S_r}{S^w_{\mbox{max}}-S^w_r}
where
\begin{eqnarray*} &S^w_r& \mbox{residual saturation of wetting phase,}\\ &S^w_{\mbox{max}}& \mbox{maximum saturation of wetting phase,}\\ &m(<=1) & \mbox{ exponent.}\\ \end{eqnarray*}
Note:
m=1/(1-n)
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No additional info.
Used in no end-to-end test cases.
