Syntax:
improper_style hybrid style1 style2 ...
Examples:
improper_style hybrid harmonic helix improper_coeff 1 harmonic 120.0 30 improper_coeff 2 cvff 20.0 -1 2
Description:
The hybrid style enables the use of multiple improper styles in one simulation. An improper style is assigned to each improper type. For example, impropers in a polymer flow (of improper type 1) could be computed with a harmonic potential and impropers in the wall boundary (of improper type 2) could be computed with a cvff potential. The assignment of improper type to style is made via the improper_coeff command or in the data file.
In the improper_coeff command, the first coefficient sets the improper style and the remaining coefficients are those appropriate to that style. In the example above, the 2 improper_coeff commands would set impropers of improper type 1 to be computed with a harmonic potential with coefficients 120.0, 30 for K, X0. Improper type 2 would be computed with a cvff potential with coefficients 20.0, -1, 2 for K, d, n.
Restrictions:
Improper styles can only be set for atom styles that allow impropers to be defined.
This improper style is part of the "molecular" package. It is only enabled if LAMMPS was built with that package. See the Making LAMMPS section for more info.
Related commands:
Default: none