jianmu
/
lammps
forked from lijiext/lammps
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
lammps/doc/compute_erotate_rigid.html

242 lines
8.7 KiB
HTML
Raw Normal View History

'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@14394 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-12-21 23:20:41 +08:00
<title>compute erotate/rigid command &mdash; LAMMPS documentation</title>
'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
<link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
<link rel="stylesheet" href="_static/sphinxcontrib-images/LightBox2/lightbox2/css/lightbox.css" type="text/css" />
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@14394 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-12-21 23:20:41 +08:00
<link rel="top" title="LAMMPS documentation" href="index.html"/>
'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
<script src="_static/js/modernizr.min.js"></script>
</head>
<body class="wy-body-for-nav" role="document">
<div class="wy-grid-for-nav">
<nav data-toggle="wy-nav-shift" class="wy-nav-side">
<div class="wy-side-nav-search">
<a href="Manual.html" class="icon icon-home"> LAMMPS
</a>
<div role="search">
<form id="rtd-search-form" class="wy-form" action="search.html" method="get">
<input type="text" name="q" placeholder="Search docs" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
</div>
<div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
<ul>
<li class="toctree-l1"><a class="reference internal" href="Section_intro.html">1. Introduction</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_start.html">2. Getting Started</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_commands.html">3. Commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_packages.html">4. Packages</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_accelerate.html">5. Accelerating LAMMPS performance</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_howto.html">6. How-to discussions</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_example.html">7. Example problems</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_perf.html">8. Performance &amp; scalability</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_tools.html">9. Additional tools</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_modify.html">10. Modifying &amp; extending LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_python.html">11. Python interface to LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_errors.html">12. Errors</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_history.html">13. Future and history</a></li>
</ul>
</div>
&nbsp;
</nav>
<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
<nav class="wy-nav-top" role="navigation" aria-label="top navigation">
<i data-toggle="wy-nav-top" class="fa fa-bars"></i>
<a href="Manual.html">LAMMPS</a>
</nav>
<div class="wy-nav-content">
<div class="rst-content">
<div role="navigation" aria-label="breadcrumbs navigation">
<ul class="wy-breadcrumbs">
<li><a href="Manual.html">Docs</a> &raquo;</li>
<li>compute erotate/rigid command</li>
<li class="wy-breadcrumbs-aside">
<a href="http://lammps.sandia.gov">Website</a>
<a href="Section_commands.html#comm">Commands</a>
</li>
</ul>
<hr/>
</div>
<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
<div itemprop="articleBody">
<div class="section" id="compute-erotate-rigid-command">
<span id="index-0"></span><h1>compute erotate/rigid command<a class="headerlink" href="#compute-erotate-rigid-command" title="Permalink to this headline"></a></h1>
<div class="section" id="syntax">
<h2>Syntax<a class="headerlink" href="#syntax" title="Permalink to this headline"></a></h2>
<div class="highlight-python"><div class="highlight"><pre>compute ID group-ID erotate/rigid fix-ID
</pre></div>
</div>
<ul class="simple">
<li>ID, group-ID are documented in <a class="reference internal" href="compute.html"><em>compute</em></a> command</li>
<li>erotate/rigid = style name of this compute command</li>
<li>fix-ID = ID of rigid body fix</li>
</ul>
</div>
<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<div class="highlight-python"><div class="highlight"><pre>compute 1 all erotate/rigid myRigid
</pre></div>
</div>
</div>
<div class="section" id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this headline"></a></h2>
<p>Define a computation that calculates the rotational kinetic energy of
a collection of rigid bodies, as defined by one of the <a class="reference internal" href="fix_rigid.html"><em>fix rigid</em></a> command variants.</p>
<p>The rotational energy of each rigid body is computed as 1/2 I Wbody^2,
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@10723 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2013-09-06 06:59:35 +08:00
where I is the inertia tensor for the rigid body, and Wbody is its
angular velocity vector. Both I and Wbody are in the frame of
'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
reference of the rigid body, i.e. I is diagonalized.</p>
<p>The <em>fix-ID</em> should be the ID of one of the <a class="reference internal" href="fix_rigid.html"><em>fix rigid</em></a>
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@10723 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2013-09-06 06:59:35 +08:00
commands which defines the rigid bodies. The group specified in the
compute command is ignored. The rotational energy of all the rigid
bodies defined by the fix rigid command in included in the
'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
calculation.</p>
<p><strong>Output info:</strong></p>
<p>This compute calculates a global scalar (the summed rotational energy
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@10723 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2013-09-06 06:59:35 +08:00
of all the rigid bodies). This value can be used by any command that
uses a global scalar value from a compute as input. See
'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
<a class="reference internal" href="Section_howto.html#howto-15"><span>Section_howto 15</span></a> for an overview of
LAMMPS output options.</p>
<p>The scalar value calculated by this compute is &#8220;extensive&#8221;. The
scalar value will be in energy <a class="reference internal" href="units.html"><em>units</em></a>.</p>
</div>
<div class="section" id="restrictions">
<h2>Restrictions<a class="headerlink" href="#restrictions" title="Permalink to this headline"></a></h2>
<p>This compute is part of the RIGID package. It is only enabled if
LAMMPS was built with that package. See the <a class="reference internal" href="Section_start.html#start-3"><span>Making LAMMPS</span></a> section for more info.</p>
</div>
<div class="section" id="related-commands">
<h2>Related commands<a class="headerlink" href="#related-commands" title="Permalink to this headline"></a></h2>
<p><code class="xref doc docutils literal"><span class="pre">compute</span> <span class="pre">ke/rigid</span></code></p>
<p><strong>Default:</strong> none</p>
</div>
</div>
</div>
</div>
<footer>
<hr/>
<div role="contentinfo">
<p>
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@14349 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-12-11 01:23:56 +08:00
&copy; Copyright 2013 Sandia Corporation.
'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
</p>
</div>
Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
</footer>
</div>
</div>
</section>
</div>
<script type="text/javascript">
var DOCUMENTATION_OPTIONS = {
URL_ROOT:'./',
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@14394 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-12-21 23:20:41 +08:00
VERSION:'',
'' git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13800 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2015-07-30 22:53:28 +08:00
COLLAPSE_INDEX:false,
FILE_SUFFIX:'.html',
HAS_SOURCE: true
};
</script>
<script type="text/javascript" src="_static/jquery.js"></script>
<script type="text/javascript" src="_static/underscore.js"></script>
<script type="text/javascript" src="_static/doctools.js"></script>
<script type="text/javascript" src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
<script type="text/javascript" src="_static/sphinxcontrib-images/LightBox2/lightbox2/js/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="_static/sphinxcontrib-images/LightBox2/lightbox2/js/lightbox.min.js"></script>
<script type="text/javascript" src="_static/sphinxcontrib-images/LightBox2/lightbox2-customize/jquery-noconflict.js"></script>
<script type="text/javascript" src="_static/js/theme.js"></script>
<script type="text/javascript">
jQuery(function () {
SphinxRtdTheme.StickyNav.enable();
});
</script>
</body>
</html>