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LaGriT
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<ul class="uk-breadcrumb">
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<li><a href="/pages/tutorial/index.html">Tutorials & Examples</a></li>
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<li><span>Stratigraphic Hex Mesh Tutorial</span></li>
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</ul>
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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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<br />
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<!-- End image --></p>
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<h2 id="build-hex" class="uk-h3 uk-margin-remove">1. Building a Hex Mesh</h2>
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<p>First, we are going to construct a structured hex mesh. The hex mesh will span
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from 0 meters to 4000 m, 4000 m, and 3000 m, for the x/y/z coordinates
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respectively.</p>
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<p>For both consistency and rapid parameter manipulation, these can be stored in
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variables. In LaGriT, variables are assigned using the <code class="language-plaintext highlighter-rouge">define</code> keyword.</p>
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<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>define / X0 / 0.
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define / X1 / 4000.
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define / Y0 / 0.
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define / Y1 / 4000.
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define / Z0 / 0.
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define / Z1 / 3000.
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define / NX / 51
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define / NY / 51
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define / NZ / 26
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define / MONAME / mohex
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</code></pre></div></div>
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<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
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mesh name (<code class="language-plaintext highlighter-rouge">MONAME</code>) have been defined.</p>
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<p>Next, we will create an empty mesh object, with element type <code class="language-plaintext highlighter-rouge">hex</code>, using the
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<a href="/pages/docs/commands/cmo/cmo_create.html"><code class="language-plaintext highlighter-rouge">cmo / create</code></a> command:</p>
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<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>cmo / create / MONAME / / / hex
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</code></pre></div></div>
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<p>Due to the variable assignment of <code class="language-plaintext highlighter-rouge">MONAME <- mohex</code> above, this command is
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translated internally as:</p>
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<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>cmo / create / mohex / / / hex
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</code></pre></div></div>
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<p>This empty object can then be populated with nodes and elements.
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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
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hex elements across a defined domain.</p>
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<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
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</code></pre></div></div>
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<p><code class="language-plaintext highlighter-rouge">NX</code> number of hex elements, along with their corresponding vertices, have been
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created in the spatial domain spanning <code class="language-plaintext highlighter-rouge">X0->X1</code>, along with <code class="language-plaintext highlighter-rouge">NY</code> elements in
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the Y domain and <code class="language-plaintext highlighter-rouge">NZ</code> elements in the Z domain.</p>
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<p>Optionally, <a href="/pages/docs/commands/DUMP2.html">save the mesh object</a>:</p>
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<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>dump / avs / tmp_hex_01.inp / MONAME
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</code></pre></div></div>
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<p>This file can be rendered in certain scientific 3D visualization applications,
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such as <a href="https://www.paraview.org">ParaView</a>.</p>
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<li><a href="/pages/tutorial/stratigraphy/index.html"><span class="uk-margin-small-right" uk-pagination-previous=""></span> Previous</a></li>
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<li class="uk-margin-auto-left"><a href="/pages/tutorial/stratigraphy/step_02.html">Next <span class="uk-margin-small-left" uk-pagination-next=""></span></a></li>
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<div class="tm-sidebar-right uk-visible@l">
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<div uk-sticky="offset: 160" class="uk-sticky uk-active uk-sticky-fixed" style="position: fixed; top: 160px; width: 200px;">
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<ul uk-scrollspy-nav="closest: li; scroll: true; offset: 100" class="uk-nav uk-nav-default tm-nav uk-nav-parent-icon">
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<li class=""><a href="/pages/tutorial/stratigraphy/index.html">Index</a></li>
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<li class="uk-active"><a href="#build-hex">1. Building a Hex Mesh</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_02.html">2. Define Boundaries Using Point Sets</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_03.html">3. Constructing Stratigraphy</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_04.html">4. Map Surfaces to Mesh</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_05.html">5. Constructing a Fault</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_06.html">6. Truncate with Polyline</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_07.html">7. Refine Fault</a></li>
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<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_09.html">9. Convert Hex Mesh to Tet</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_10_fehm.html">10.1 Write FEHM Files</a></li>
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<li class=""><a href="/pages/tutorial/stratigraphy/step_10_exo.html">10.2 Write ExodusII Files</a></li>
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<a href="/">Home</a>
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·
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<a href="/pylagrit/original/index.html">PyLaGriT</a>
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·
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<a href="https://int.lanl.gov/org/ddste/aldcels/ees/index.shtml">EES-16</a>
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<a href="/pages/licensing.html">License</a>
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<a href="https://lagrit.lanl.gov/">Contact</a>
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<p>© 2019 Los Alamos National Laboratory</p>
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<p>EES-16 | Computational Earth Science</p>
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<p>LA-CC-15-069</p>
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