forked from lijiext/lammps
59 lines
1.8 KiB
HTML
59 lines
1.8 KiB
HTML
<HTML>
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<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
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<HR>
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<H3>angle_style hybrid command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>angle_style hybrid style1 style2 ...
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</PRE>
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<UL><LI>style1,style2 = list of one or more angle styles
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>angle_style hybrid harmonic cosine
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angle_coeff 1 harmonic 80.0 1.2
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angle_coeff 2* cosine 50.0
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>The <I>hybrid</I> style enables the use of multiple angle styles in one
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simulation. An angle style is assigned to each angle type. For
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example, angles in a polymer flow (of angle type 1) could be computed
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with a <I>harmonic</I> potential and angles in the wall boundary (of angle
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type 2) could be computed with a <I>cosine</I> potential. The assignment
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of angle type to style is made via the <A HREF = "angle_coeff.html">angle_coeff</A>
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command or in the data file.
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</P>
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<P>In the angle_coeff command, the first coefficient sets the angle style
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and the remaining coefficients are those appropriate to that style.
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In the example above, the 2 angle_coeff commands would set angles of
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angle type 1 to be computed with a <I>harmonic</I> potential with
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coefficients 80.0, 1.2 for K, r0. All other angle types (2-N) would
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be computed with a <I>cosine</I> potential with coefficient 50.0 for K.
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</P>
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<P><B>Restrictions:</B>
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</P>
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<P>Angle styles can only be set for atom styles that allow angles to be
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defined.
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</P>
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<P>This angle style is part of the "molecular" package. It is only
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enabled if LAMMPS was built with that package. See the <A HREF = "Section_start.html#2_2">Making
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LAMMPS</A> section for more info.
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</P>
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<P><B>Related commands:</B>
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</P>
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<P><A HREF = "angle_coeff.html">angle_coeff</A>
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</P>
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<P><B>Default:</B> none
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</P>
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</HTML>
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