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LaGriT/docs/_site/pages/tutorial/stratigraphy/step_01.html

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<li><span>Stratigraphic Hex Mesh Tutorial</span></li>
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<p><img data-src="/pages/tutorial/stratigraphy/images/01_hex_01.png" width="639" height="525" alt="" uk-img="" />
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<h2 id="build-hex" class="uk-h3 uk-margin-remove">1. Building a Hex Mesh</h2>
<p>First, we are going to construct a structured hex mesh. The hex mesh will span
from 0 meters to 4000 m, 4000 m, and 3000 m, for the x/y/z coordinates
respectively.</p>
<p>For both consistency and rapid parameter manipulation, these can be stored in
variables. In LaGriT, variables are assigned using the <code class="language-plaintext highlighter-rouge">define</code> keyword.</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>define / X0 / 0.
define / X1 / 4000.
define / Y0 / 0.
define / Y1 / 4000.
define / Z0 / 0.
define / Z1 / 3000.
define / NX / 51
define / NY / 51
define / NZ / 26
define / MONAME / mohex
</code></pre></div></div>
<p>Above, the spatial domain (<code class="language-plaintext highlighter-rouge">X0,X1,Y0,...</code>), element density (<code class="language-plaintext highlighter-rouge">NX/NY/NZ</code>), and
mesh name (<code class="language-plaintext highlighter-rouge">MONAME</code>) have been defined.</p>
<p>Next, we will create an empty mesh object, with element type <code class="language-plaintext highlighter-rouge">hex</code>, using the
<a href="/pages/docs/commands/cmo/cmo_create.html"><code class="language-plaintext highlighter-rouge">cmo / create</code></a> command:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>cmo / create / MONAME / / / hex
</code></pre></div></div>
<p>Due to the variable assignment of <code class="language-plaintext highlighter-rouge">MONAME &lt;- mohex</code> above, this command is
translated internally as:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>cmo / create / mohex / / / hex
</code></pre></div></div>
<p>This empty object can then be populated with nodes and elements.
The <a href="/pages/docs/commands/createpts/CRTPTBRICK.html"><code class="language-plaintext highlighter-rouge">createpts / brick</code></a> command will generate a defined number of
hex elements across a defined domain.</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>createpts / brick / xyz / NX NY NZ / X0 Y0 Z0 / X1 Y1 Z1 / 1 1 1
</code></pre></div></div>
<p><code class="language-plaintext highlighter-rouge">NX</code> number of hex elements, along with their corresponding vertices, have been
created in the spatial domain spanning <code class="language-plaintext highlighter-rouge">X0-&gt;X1</code>, along with <code class="language-plaintext highlighter-rouge">NY</code> elements in
the Y domain and <code class="language-plaintext highlighter-rouge">NZ</code> elements in the Z domain.</p>
<p>Optionally, <a href="/pages/docs/commands/DUMP2.html">save the mesh object</a>:</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>dump / avs / tmp_hex_01.inp / MONAME
</code></pre></div></div>
<p>This file can be rendered in certain scientific 3D visualization applications,
such as <a href="https://www.paraview.org">ParaView</a>.</p>
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<li class="uk-active"><a href="#build-hex">1. Building a Hex Mesh</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_02.html">2. Define Boundaries Using Point Sets</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_03.html">3. Constructing Stratigraphy</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_04.html">4. Map Surfaces to Mesh</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_05.html">5. Constructing a Fault</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_06.html">6. Truncate with Polyline</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_07.html">7. Refine Fault</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_08.html">8. Insert Wells</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_10_fehm.html">10.1 Write FEHM Files</a></li>
<li class=""><a href="/pages/tutorial/stratigraphy/step_10_exo.html">10.2 Write ExodusII Files</a></li>
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