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<a name="Cell-and-Transfer"></a>
<ul class="toc"><li><a href="mini_ker.html#Top">Miniker 102 manual</a> </li>
<li><ul class="toc"><li><a href="TEF-overview.html#TEF-overview">1. An overview of the <acronym>TEF</acronym> formalism</a> </li>
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<a name="Cell-and-Transfer-equations"></a>
<h2 class="section"> 1.1 Cell and Transfer equations </h2>
<p>In the <acronym title="Transfer Evolution Formalism">TEF</acronym>, a model is
mathematically represented by a set of equations corresponding
to two kinds objects:
</p>
<ol>
<li> Cells which are elementary models and correspond to evolution equations
such as:
<center class="math-display" >
<img
src="mini_ker_tex4ht_tex0x.png" alt="∂ η(t) = g(η(t),φ(t))
t " class="math-display" ></center>
<p>Vector η represent the state variables of cells and
the vector φ represent the dependent
boundary conditions, <i>i.e.</i> the
variables considered as boundary conditions by a cell, but depending upon
the complete model state. This dependent boundary conditions are
required to make the cells correspond to well-posed problems.
These variables are often called state variables, and prognostic
variables in meteorology.
</p>
</li><li> Transfers which are determined by constraint equations such as:
<center class="math-display" >
<img
src="mini_ker_tex4ht_tex1x.png" alt="φ(t) = f (η(t),φ (t)) " class="math-display" ></center>
These equations are often called algebraic equations, and in meteorology
diagnostic equations.
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