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    <title>ONELAB: Open Numerical Engineering LABoratory</title>
    
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    <h1 class="short">ONELAB</h1>
    
    <h1>Open Numerical Engineering LABoratory
      <a href="https://www.twitter.com/OnelabModels"><img class="social"
         src="twitter.png" alt="twitter"></a>
    </h1>
    
    <div><span style="white-space:nowrap"><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Inductor"><!--
    --><img width="25%" src="small_inductor.png"></a><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Magnetometer"><!--
    --><img width="25%" src="small_magnetometer.png"></a><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Electric-machines"><!--
    --><img width="25%" src="small_machines.png"></a><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Magnetodynamics-with-cohomology-conditions"><!--
    --><img width="25%" src="small_indheat.png"></a><!--
    --></span><br><span style="white-space:nowrap"><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Waveguides"><!--
    --><img width="25%" src="small_waveguides.png"></a><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Electromechanical-relay"><!--
    --><img width="25%" src="small_relay.png"></a><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Bloch-modes-in-periodic-waveguides"><!--
    --><img width="25%" src="small_bloch.png"></a><!--
    --><a href="https://gitlab.onelab.info/doc/models/wikis/Acoustic-scattering"><!--
    --><img width="25%" src="small_acoustic.png"></a><!--
    --></span></div>
    
    <p>
    ONELAB is an open-source, lightweight interface to finite element software. It
    is completely free: the default ONELAB software bundle contains the mesh
    generator <a href="https://gmsh.info">Gmsh</a>, the finite element solver
    <a href="https://getdp.info">GetDP</a> and the optimization
    library <a href="conveks">con<u>v</u>eks</a>. Many other codes (free
    or not) can be easily interfaced as well.
    </p>
    
    <h2>Getting started</h2>
    
    <ol><a name="Download"></a>
      <li>Download the ONELAB software bundle:
      <ul>
        <li>Desktop version for <a href="files/onelab-Windows64.zip">Windows</a>,
          <a href="files/onelab-Linux64.zip">Linux</a> or
          <a href="files/onelab-MacOSX.dmg">macOS</a> <a href="#1"><sup>*</sup></a>
        <li>Mobile version for <a href="https://play.google.com/store/apps/details?id=org.geuz.onelab">Android</a> and
          <a href="https://itunes.apple.com/us/app/onelab/id845930897">iOS</a>
        <li><a href="files/onelab-source.zip">Source code</a>
      </ul>
      <li>Launch the app <img src="https://gmsh.info/gallery/icon.png" height=20px>
      <li>Open a model:
      <ul>
        <li>Desktop version: go to the <code>File/Open</code> menu and select a
        GetDP <code>.pro</code> file,
        e.g. <code>models/Magnetometer/<a href="https://gitlab.onelab.info/doc/models/blob/master/Magnetometer/magnetometer.pro">magnetometer.pro"</a></code>
        <li>Mobile version: select one of the preloaded models
      </ul>
      <li>Press <code>Run</code>
      <li>... then explore
        <a href="https://gitlab.onelab.info/doc/models/wikis">other models</a>, or
        learn how to create your own with
        <a href="https://gitlab.onelab.info/doc/tutorials/wikis">the tutorials</a>
    </ol>
    
    <div class="small">
      <a name="1"><sup>*</sup></a> Desktop versions require Windows 10, Linux with
      glibc &ge; 2.24, or macOS &ge; 10.15
    </div>
    
    <h2>Additional information</h2>
    
    <p>
      ONELAB can interface finite element and related software (<em>ONELAB
        clients</em>) in several ways:
    </p>
    <ol>
      <li>By using the ONELAB C++ library or the ONELAB Python module to communicate
        with the Gmsh ONELAB server over TCP/IP or Unix sockets. This is what is
        done by <a href="https://getdp.info">GetDP</a>; any C++ and Python code can
        do the same with minimal code modifications.
      <li>By using the Gmsh API in C++, C, Python or Julia to comunicate with the
        ONELAB server over TCP/IP or Unix sockets, or directly in-memory. This
        allows complete flexibility over how the client interacts with ONELAB
        (e.g. by pre-processing its input files) and has been successfully used with
        e.g.  <a href="https://www.csc.fi/web/elmer">Elmer</a>,
        <a href="https://www.openfoam.com/">OpenFOAM</a>,
        <a href="https://www.code-aster.org/">Code_Aster</a>,
        <a href="https://www.3ds.com/fr/produits-et-services/simulia/produits/abaqus">Abaqus</a>,
        <a href="http://www.calculix.de">CalculiX</a>,
        <a href="https://www.uee.uliege.be/cms/c_6331644/fr/uee-safir">Safir</a>, ...
    </ol>
    <p>
      The ONELAB interface allows to interact with clients and have them share
      parameters and modeling information.  Contrary to most solver interfaces, the
      ONELAB server has no <em>a priori</em> knowledge about any specifics (input
      file format, syntax, ...) of the clients. This is made possible by having any
      simulation preceded by an analysis phase, during which the clients are asked
      to upload their parameter set to the server. The issues of completeness and
      consistency of the parameter sets are completely dealt with on the client
      side: the role of ONELAB is limited to data centralization, modification and
      re-dispatching.
    </p>
    <p>
      See this <a href="slides/onelab.pdf">general presentation</a> for more
      information and
      the <a href="https://gitlab.onelab.info/doc/tutorials/wikis">tutorials</a> for
      examples.
    </p>
    
    <h2>Sponsors</h2>
    
    <p>
      The ONELAB project was funded by the Walloon Region under
      <a href="http://recherche-technologie.wallonie.be/projets/index.html?IDD=17018">WIST3
        grant n° 1017086</a> and <em>Fonds de maturation</em> grant n° 1217742
      (AWE), and was sponsored by <a href="http://www.gdtech.eu">GDTech</a>
      and <a href="http://www.audaxis.com">Audaxis</a>. Additional funding has
      been provided by <a href="http://www.belspo.be">the Belgian Science
        Policy</a> under grant IAP P7/02.
    </p>
    
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