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% Copyright (c) 20032010 by University of Queensland 
% Copyright (c) 20032012 by University of Queensland 
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% Earth Systems Science Computational Center (ESSCC) 
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\section{Darcy Flux} 
\section{Darcy Flux} 
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\label{DARCY FLUX} 
\label{DARCY FLUX} 
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We want to calculate the velocity $u$ and pressure $p$ on a domain $\Omega$ 
We want to calculate the flux $u$ and pressure $p$ on a domain $\Omega$ 
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solving the Darcy flux problem\index{Darcy flux}\index{Darcy flow} 
solving the Darcy flux problem\index{Darcy flux}\index{Darcy flow} 
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\begin{equation}\label{DARCY PROBLEM} 
\begin{equation}\label{DARCY PROBLEM} 
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\begin{array}{rcl} 
\begin{array}{rcl} 