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<div class="section" id="fix-nvt-manifold-rattle-command">
<span id="index-0"></span><h1>fix nvt/manifold/rattle command</h1>
<div class="section" id="syntax">
<h2>Syntax</h2>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">fix</span> <span class="n">ID</span> <span class="n">group</span><span class="o">-</span><span class="n">ID</span> <span class="n">nvt</span><span class="o">/</span><span class="n">manifold</span><span class="o">/</span><span class="n">rattle</span> <span class="n">tol</span> <span class="n">maxit</span> <span class="n">manifold</span> <span class="n">manifold</span><span class="o">-</span><span class="n">args</span> <span class="n">keyword</span> <span class="n">value</span> <span class="o">...</span>
</pre></div>
</div>
<ul class="simple">
<li>ID, group-ID are documented in <a class="reference internal" href="fix.html"><span class="doc">fix</span></a> command</li>
<li>nvt/manifold/rattle = style name of this fix command</li>
<li>tol = tolerance to which Newton iteration must converge</li>
<li>maxit = maximum number of iterations to perform</li>
<li>manifold = name of the manifold</li>
<li>manifold-args = parameters for the manifold</li>
<li>one or more keyword/value pairs may be appended</li>
</ul>
<pre class="literal-block">
keyword = <em>temp</em> or <em>tchain</em> or <em>every</em>
<em>temp</em> values = Tstart Tstop Tdamp
Tstart, Tstop = external temperature at start/end of run
Tdamp = temperature damping parameter (time units)
<em>tchain</em> value = N
N = length of thermostat chain (1 = single thermostat)
<em>every</em> value = N
N = print info about iteration every N steps. N = 0 means no output
</pre>
</div>
<div class="section" id="examples">
<h2>Examples</h2>
<p>fix 1 all nvt/manifold/rattle 1e-4 10 cylinder 3.0 temp 1.0 1.0 10.0</p>
</div>
<div class="section" id="description">
<h2>Description</h2>
<p>This fix combines the RATTLE-based <a class="reference internal" href="fix_shake.html#andersen"><span class="std std-ref">(Andersen)</span></a> time integrator of <a class="reference internal" href="fix_nve_manifold_rattle.html"><span class="doc">fix nve/manifold/rattle</span></a> <a class="reference internal" href="manifolds.html#paquay"><span class="std std-ref">(Paquay)</span></a> with a Nose-Hoover-chain thermostat to sample the
canonical ensemble of particles constrained to a curved surface (manifold). This sampling does suffer from discretization bias of O(dt).
For a list of currently supported manifolds and their parameters, see <a class="reference internal" href="manifolds.html"><span class="doc">manifolds</span></a></p>
</div>
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<div class="section" id="restart-fix-modify-output-run-start-stop-minimize-info">
<h2>Restart, fix_modify, output, run start/stop, minimize info</h2>
<p>No information about this fix is written to <a class="reference internal" href="restart.html"><span class="doc">binary restart files</span></a>. None of the <a class="reference internal" href="fix_modify.html"><span class="doc">fix_modify</span></a> options
are relevant to this fix. No global or per-atom quantities are stored
by this fix for access by various <a class="reference internal" href="Section_howto.html#howto-15"><span class="std std-ref">output commands</span></a>. No parameter of this fix can
be used with the <em>start/stop</em> keywords of the <a class="reference internal" href="run.html"><span class="doc">run</span></a> command.
This fix is not invoked during <a class="reference internal" href="minimize.html"><span class="doc">energy minimization</span></a>.</p>
</div>
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<div class="section" id="restrictions">
<h2>Restrictions</h2>
<p>This fix is part of the USER-MANIFOLD 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 class="std std-ref">Making LAMMPS</span></a>
section for more info.</p>
<p>Only use this with <em>min_style hftn</em> or <em>min_style quickmin</em>. If not, the constraints
will not be satisfied very well at all. A warning is generated if the <em>min_style</em> is
incompatible but no error.</p>
</div>
<hr class="docutils" />
<div class="section" id="related-commands">
<h2>Related commands</h2>
<p><a class="reference internal" href="#"><span class="doc">fix nve/manifold/rattle</span></a>, <a class="reference internal" href="fix_manifoldforce.html"><span class="doc">fix manifoldforce</span></a>
<strong>Default:</strong> every = 0</p>
<hr class="docutils" />
<p id="andersen"><strong>(Andersen)</strong> Andersen, J. Comp. Phys. 52, 24, (1983).</p>
<p id="paquay"><strong>(Paquay)</strong> Paquay and Kusters, Biophys. J., 110, ???, (2016), to be published,
preprint available at <a class="reference external" href="http://arxiv.org/abs/1411.3019/">arXiv:1411.3019</a>.</p>
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