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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@15299 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp
2016-07-13 21:34:23 +00:00
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8
doc/html/_sources/pair_gran.txt
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@ -91,7 +91,7 @@ The other quantities in the equations are as follows:
* gamma_n = viscoelastic damping constant for normal contact
* gamma_t = viscoelastic damping constant for tangential contact
* m_eff = Mi Mj / (Mi + Mj) = effective mass of 2 particles of mass Mi and Mj
* Delta St = tangential displacement vector between 2 spherical particles which is truncated to satisfy a frictional yield criterion
* Delta St = tangential displacement vector between 2 particles which is truncated to satisfy a frictional yield criterion
* n_ij = unit vector along the line connecting the centers of the 2 particles
* Vn = normal component of the relative velocity of the 2 particles
* Vt = tangential component of the relative velocity of the 2 particles
@ -170,6 +170,12 @@ holds, though the spring is no longer linear.
for modeling of systems which can sustain very large tangential
forces.
The effective mass *m_eff* is given by the formula above for two
isolated particles. If either particle is part of a rigid body, its
mass is replaced by the mass of the rigid body in the formula above.
This is determined by searching for a :doc:`fix rigid <fix_rigid>`
command (or its variants).
For granular styles there are no additional coefficients to set for
each pair of atom types via the :doc:`pair_coeff <pair_coeff>` command.
All settings are global and are made via the pair_style command.