From b67baddc2440a67f60fb168d4d59a484b285c4b5 Mon Sep 17 00:00:00 2001 From: sjplimp Date: Wed, 30 Apr 2008 15:16:54 +0000 Subject: [PATCH] git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@1779 f3b2605a-c512-4ea7-a41b-209d697bcdaa --- doc/pair_lubricate.html | 27 ++++++++++++++------------- doc/pair_lubricate.txt | 27 ++++++++++++++------------- 2 files changed, 28 insertions(+), 26 deletions(-) diff --git a/doc/pair_lubricate.html b/doc/pair_lubricate.html index 7c14173640..c7d54cf3ff 100644 --- a/doc/pair_lubricate.html +++ b/doc/pair_lubricate.html @@ -39,23 +39,24 @@ spherical particles via this formula from (Ball and Melrose)

which represents the dissipation W between two nearby particles due to -the background solvent. Rc is the outer cutoff specified in the -pair_style command, the translational velocities of the 2 particles -are v1 and v2, the angular velocities are w1 and w2, and n is the unit -vector in the direction from particle 1 to 2. The 4 terms represent -four modes of pairwise interaction: squeezing, shearing, pumping, and -twisting. The 4 flags in the pair_style command turn on or off each -of these modes by including or excluding each term. The 4 -coefficients on each term are functions of the separation distance of -the particles. Details are given in (Ball and Melrose), -including the forces and torques that result from taking derivatives -of this equation (see Appendix A). +their relative velocities in the presence of a background solvent. Rc +is the outer cutoff specified in the pair_style command, the +translational velocities of the 2 particles are v1 and v2, the angular +velocities are w1 and w2, and n is the unit vector in the direction +from particle 1 to 2. The 4 terms represent four modes of pairwise +interaction: squeezing, shearing, pumping, and twisting. The 4 flags +in the pair_style command turn on or off each of these modes by +including or excluding each term. The 4 coefficients on each term are +functions of the separation distance of the particles. Details are +given in (Ball and Melrose), including the forces and torques +that result from taking derivatives of this equation with respect to +velocity (see Appendix A).

Unlike most pair potentials, the two specified cutoffs (cutinner and cutoff) refer to the surface-to-surface separation between two particles, not center-to-center distance. Currently, this pair style -can only be used for mono-disperse spheres (same radii), so that -separation is r_ij - 2*radius, where r_ij is the center-to-center +can only be used for mono-disperse extended spheres (same radii), so +that separation is r_ij - 2*radius, where r_ij is the center-to-center distance between the particles. Within the inner cutoff cutinner, the forces and torques are evaluated at a separation of cutinner. The outer cutoff is the separation distance beyond which the pair-wise diff --git a/doc/pair_lubricate.txt b/doc/pair_lubricate.txt index ae95247fad..7b8438f6eb 100644 --- a/doc/pair_lubricate.txt +++ b/doc/pair_lubricate.txt @@ -36,23 +36,24 @@ spherical particles via this formula from "(Ball and Melrose)"_#Ball :c,image(Eqs/pair_lubricate.jpg) which represents the dissipation W between two nearby particles due to -the background solvent. Rc is the outer cutoff specified in the -pair_style command, the translational velocities of the 2 particles -are v1 and v2, the angular velocities are w1 and w2, and n is the unit -vector in the direction from particle 1 to 2. The 4 terms represent -four modes of pairwise interaction: squeezing, shearing, pumping, and -twisting. The 4 flags in the pair_style command turn on or off each -of these modes by including or excluding each term. The 4 -coefficients on each term are functions of the separation distance of -the particles. Details are given in "(Ball and Melrose)"_#Ball, -including the forces and torques that result from taking derivatives -of this equation (see Appendix A). +their relative velocities in the presence of a background solvent. Rc +is the outer cutoff specified in the pair_style command, the +translational velocities of the 2 particles are v1 and v2, the angular +velocities are w1 and w2, and n is the unit vector in the direction +from particle 1 to 2. The 4 terms represent four modes of pairwise +interaction: squeezing, shearing, pumping, and twisting. The 4 flags +in the pair_style command turn on or off each of these modes by +including or excluding each term. The 4 coefficients on each term are +functions of the separation distance of the particles. Details are +given in "(Ball and Melrose)"_#Ball, including the forces and torques +that result from taking derivatives of this equation with respect to +velocity (see Appendix A). Unlike most pair potentials, the two specified cutoffs (cutinner and cutoff) refer to the surface-to-surface separation between two particles, not center-to-center distance. Currently, this pair style -can only be used for mono-disperse spheres (same radii), so that -separation is r_ij - 2*radius, where r_ij is the center-to-center +can only be used for mono-disperse extended spheres (same radii), so +that separation is r_ij - 2*radius, where r_ij is the center-to-center distance between the particles. Within the inner cutoff {cutinner}, the forces and torques are evaluated at a separation of cutinner. The outer {cutoff} is the separation distance beyond which the pair-wise