Loading doc/src/fix_wall_body_polygon.txt 0 → 100644 +100 −0 Original line number Diff line number Diff line "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c :link(lws,http://lammps.sandia.gov) :link(ld,Manual.html) :link(lc,Section_commands.html#comm) :line fix wall/body/polygon command :h3 [Syntax:] fix ID group-ID wall/body/polygon k_n c_n c_t wallstyle args keyword values ... :pre ID, group-ID are documented in "fix"_fix.html command :ulb,l wall/body/polygon = style name of this fix command :l k_n = normal repulsion strength (force/distance units or pressure units - see discussion below) :l c_n = normal damping coefficient (force/distance units or pressure units - see discussion below) :l c_t = tangential damping coefficient (force/distance units or pressure units - see discussion below) :l wallstyle = {xplane} or {yplane} or {zplane} or {zcylinder} :l args = list of arguments for a particular style :l {xplane} or {yplane} args = lo hi lo,hi = position of lower and upper plane (distance units), either can be NULL) {zcylinder} args = radius radius = cylinder radius (distance units) :pre zero or more keyword/value pairs may be appended to args :l keyword = {wiggle} :l {wiggle} values = dim amplitude period dim = {x} or {y} or {z} amplitude = size of oscillation (distance units) period = time of oscillation (time units) :pre :ule [Examples:] fix 1 all wall/body/polygon 1000.0 20.0 5.0 xplane -10.0 10.0 [Description:] Bound the simulation domain of systems of body particles of style body/rounded/polygon with wall(s). All particles in the group interact with the wall when they are close enough to touch it. The nature of the interaction between the wall and the polygons is the same as that between the polygons themselves, which is similar to the Hookean potential. This fix is designed for use with the "body/rounded/polygon" body style, which is specified as an argument to the "atom-style body" command. The parameters {k_n}, {c_n}, {c_t} have the same meaning and units as those specified with the "pair_style body/rounded/polygon"_pair_body_rounded_polygon.html commands. The {wallstyle} can be planar or cylindrical. The 3 planar options specify a pair of walls in a dimension. Wall positions are given by {lo} and {hi}. Either of the values can be specified as NULL if a single wall is desired. For a {zcylinder} wallstyle, the cylinder's axis is at x = y = 0.0, and the radius of the cylinder is specified. Optionally, the wall can be moving, if the {wiggle} keyword is appended. For the {wiggle} keyword, the wall oscillates sinusoidally, similar to the oscillations of particles which can be specified by the "fix move"_fix_move.html command. This is useful in packing simulations of particles. The arguments to the {wiggle} keyword specify a dimension for the motion, as well as it's {amplitude} and {period}. Note that if the dimension is in the plane of the wall, this is effectively a shearing motion. If the dimension is perpendicular to the wall, it is more of a shaking motion. A {zcylinder} wall can only be wiggled in the z dimension. Each timestep, the position of a wiggled wall in the appropriate {dim} is set according to this equation: position = coord + A - A cos (omega * delta) :pre where {coord} is the specified initial position of the wall, {A} is the {amplitude}, {omega} is 2 PI / {period}, and {delta} is the time elapsed since the fix was specified. The velocity of the wall is set to the derivative of this expression. [Restart, fix_modify, output, run start/stop, minimize info:] None of the "fix_modify"_fix_modify.html options are relevant to this fix. No global or per-atom quantities are stored by this fix for access by various "output commands"_Section_howto.html#howto_15. No parameter of this fix can be used with the {start/stop} keywords of the "run"_run.html command. This fix is not invoked during "energy minimization"_minimize.html. [Restrictions:] This fix is part of the BODY package. It is only enabled if LAMMPS was built with that package. See the "Making LAMMPS"_Section_start.html#start_3 section for more info. Any dimension (xyz) that has a wall must be non-periodic. [Related commands:] "pair_style body/rounded/polygon"_pair_body_rounded_polygon.html [Default:] none doc/src/fix_wall_body_polyhedron.txt 0 → 100644 +100 −0 Original line number Diff line number Diff line "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c :link(lws,http://lammps.sandia.gov) :link(ld,Manual.html) :link(lc,Section_commands.html#comm) :line fix wall/body/polyhedron command :h3 [Syntax:] fix ID group-ID wall/body/polyhedron k_n c_n c_t wallstyle args keyword values ... :pre ID, group-ID are documented in "fix"_fix.html command :ulb,l wall/body/polyhedron = style name of this fix command :l k_n = normal repulsion strength (force/distance units or pressure units - see discussion below) :l c_n = normal damping coefficient (force/distance units or pressure units - see discussion below) :l c_t = tangential damping coefficient (force/distance units or pressure units - see discussion below) :l wallstyle = {xplane} or {yplane} or {zplane} or {zcylinder} :l args = list of arguments for a particular style :l {xplane} or {yplane} args = lo hi lo,hi = position of lower and upper plane (distance units), either can be NULL) {zcylinder} args = radius radius = cylinder radius (distance units) :pre zero or more keyword/value pairs may be appended to args :l keyword = {wiggle} :l {wiggle} values = dim amplitude period dim = {x} or {y} or {z} amplitude = size of oscillation (distance units) period = time of oscillation (time units) :pre :ule [Examples:] fix 1 all wall/body/polyhedron 1000.0 20.0 5.0 xplane -10.0 10.0 [Description:] Bound the simulation domain of systems of body particles of style body/rounded/polyhedron with wall(s). All particles in the group interact with the wall when they are close enough to touch it. The nature of the interaction between the wall and the polygons is the same as that between the polygons themselves, which is similar to the Hookean potential. This fix is designed for use with the "body/rounded/polyhedron" body style, which is specified as an argument to the "atom-style body" command. The parameters {k_n}, {c_n}, {c_t} have the same meaning and units as those specified with the "pair_style body/rounded/polyhedron"_pair_body_rounded_polygon.html commands. The {wallstyle} can be planar or cylindrical. The 3 planar options specify a pair of walls in a dimension. Wall positions are given by {lo} and {hi}. Either of the values can be specified as NULL if a single wall is desired. For a {zcylinder} wallstyle, the cylinder's axis is at x = y = 0.0, and the radius of the cylinder is specified. Optionally, the wall can be moving, if the {wiggle} keyword is appended. For the {wiggle} keyword, the wall oscillates sinusoidally, similar to the oscillations of particles which can be specified by the "fix move"_fix_move.html command. This is useful in packing simulations of particles. The arguments to the {wiggle} keyword specify a dimension for the motion, as well as it's {amplitude} and {period}. Note that if the dimension is in the plane of the wall, this is effectively a shearing motion. If the dimension is perpendicular to the wall, it is more of a shaking motion. A {zcylinder} wall can only be wiggled in the z dimension. Each timestep, the position of a wiggled wall in the appropriate {dim} is set according to this equation: position = coord + A - A cos (omega * delta) :pre where {coord} is the specified initial position of the wall, {A} is the {amplitude}, {omega} is 2 PI / {period}, and {delta} is the time elapsed since the fix was specified. The velocity of the wall is set to the derivative of this expression. [Restart, fix_modify, output, run start/stop, minimize info:] None of the "fix_modify"_fix_modify.html options are relevant to this fix. No global or per-atom quantities are stored by this fix for access by various "output commands"_Section_howto.html#howto_15. No parameter of this fix can be used with the {start/stop} keywords of the "run"_run.html command. This fix is not invoked during "energy minimization"_minimize.html. [Restrictions:] This fix is part of the BODY package. It is only enabled if LAMMPS was built with that package. See the "Making LAMMPS"_Section_start.html#start_3 section for more info. Any dimension (xyz) that has a wall must be non-periodic. [Related commands:] "pair_style body/rounded/polyhedron"_pair_body_rounded_polygon.html [Default:] none doc/src/pair_body_rounded_polygon.txt +2 −2 Original line number Diff line number Diff line Loading @@ -53,8 +53,8 @@ the examples above, or in the data file or restart files read by the "read_data"_read_data.html or "read_restart"_read_restart.html commands: k_n (energy/distance^2) k_na (energy/distance^2) :ul k_n (energy/distance^2 units) k_na (energy/distance^2 units) :ul [Related commands:] Loading doc/src/pair_body_rounded_polyhedron.txt +2 −2 Original line number Diff line number Diff line Loading @@ -53,8 +53,8 @@ the examples above, or in the data file or restart files read by the "read_data"_read_data.html or "read_restart"_read_restart.html commands: k_n (energy/distance^2) k_na (energy/distance^2) :ul k_n (energy/distance^2 units) k_na (energy/distance^2 units) :ul [Related commands:] Loading src/BODY/fix_wall_body_polygon.h +3 −1 Original line number Diff line number Diff line Loading @@ -45,7 +45,9 @@ class FixWallBodyPolygon : public Fix { protected: int wallstyle,pairstyle,wiggle,axis; double kn,c_n,c_t; double kn; // normal repulsion strength double c_n; // normal damping coefficient double c_t; // tangential damping coefficient double lo,hi,cylradius; double amplitude,period,omega; double dt; Loading Loading
doc/src/fix_wall_body_polygon.txt 0 → 100644 +100 −0 Original line number Diff line number Diff line "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c :link(lws,http://lammps.sandia.gov) :link(ld,Manual.html) :link(lc,Section_commands.html#comm) :line fix wall/body/polygon command :h3 [Syntax:] fix ID group-ID wall/body/polygon k_n c_n c_t wallstyle args keyword values ... :pre ID, group-ID are documented in "fix"_fix.html command :ulb,l wall/body/polygon = style name of this fix command :l k_n = normal repulsion strength (force/distance units or pressure units - see discussion below) :l c_n = normal damping coefficient (force/distance units or pressure units - see discussion below) :l c_t = tangential damping coefficient (force/distance units or pressure units - see discussion below) :l wallstyle = {xplane} or {yplane} or {zplane} or {zcylinder} :l args = list of arguments for a particular style :l {xplane} or {yplane} args = lo hi lo,hi = position of lower and upper plane (distance units), either can be NULL) {zcylinder} args = radius radius = cylinder radius (distance units) :pre zero or more keyword/value pairs may be appended to args :l keyword = {wiggle} :l {wiggle} values = dim amplitude period dim = {x} or {y} or {z} amplitude = size of oscillation (distance units) period = time of oscillation (time units) :pre :ule [Examples:] fix 1 all wall/body/polygon 1000.0 20.0 5.0 xplane -10.0 10.0 [Description:] Bound the simulation domain of systems of body particles of style body/rounded/polygon with wall(s). All particles in the group interact with the wall when they are close enough to touch it. The nature of the interaction between the wall and the polygons is the same as that between the polygons themselves, which is similar to the Hookean potential. This fix is designed for use with the "body/rounded/polygon" body style, which is specified as an argument to the "atom-style body" command. The parameters {k_n}, {c_n}, {c_t} have the same meaning and units as those specified with the "pair_style body/rounded/polygon"_pair_body_rounded_polygon.html commands. The {wallstyle} can be planar or cylindrical. The 3 planar options specify a pair of walls in a dimension. Wall positions are given by {lo} and {hi}. Either of the values can be specified as NULL if a single wall is desired. For a {zcylinder} wallstyle, the cylinder's axis is at x = y = 0.0, and the radius of the cylinder is specified. Optionally, the wall can be moving, if the {wiggle} keyword is appended. For the {wiggle} keyword, the wall oscillates sinusoidally, similar to the oscillations of particles which can be specified by the "fix move"_fix_move.html command. This is useful in packing simulations of particles. The arguments to the {wiggle} keyword specify a dimension for the motion, as well as it's {amplitude} and {period}. Note that if the dimension is in the plane of the wall, this is effectively a shearing motion. If the dimension is perpendicular to the wall, it is more of a shaking motion. A {zcylinder} wall can only be wiggled in the z dimension. Each timestep, the position of a wiggled wall in the appropriate {dim} is set according to this equation: position = coord + A - A cos (omega * delta) :pre where {coord} is the specified initial position of the wall, {A} is the {amplitude}, {omega} is 2 PI / {period}, and {delta} is the time elapsed since the fix was specified. The velocity of the wall is set to the derivative of this expression. [Restart, fix_modify, output, run start/stop, minimize info:] None of the "fix_modify"_fix_modify.html options are relevant to this fix. No global or per-atom quantities are stored by this fix for access by various "output commands"_Section_howto.html#howto_15. No parameter of this fix can be used with the {start/stop} keywords of the "run"_run.html command. This fix is not invoked during "energy minimization"_minimize.html. [Restrictions:] This fix is part of the BODY package. It is only enabled if LAMMPS was built with that package. See the "Making LAMMPS"_Section_start.html#start_3 section for more info. Any dimension (xyz) that has a wall must be non-periodic. [Related commands:] "pair_style body/rounded/polygon"_pair_body_rounded_polygon.html [Default:] none
doc/src/fix_wall_body_polyhedron.txt 0 → 100644 +100 −0 Original line number Diff line number Diff line "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c :link(lws,http://lammps.sandia.gov) :link(ld,Manual.html) :link(lc,Section_commands.html#comm) :line fix wall/body/polyhedron command :h3 [Syntax:] fix ID group-ID wall/body/polyhedron k_n c_n c_t wallstyle args keyword values ... :pre ID, group-ID are documented in "fix"_fix.html command :ulb,l wall/body/polyhedron = style name of this fix command :l k_n = normal repulsion strength (force/distance units or pressure units - see discussion below) :l c_n = normal damping coefficient (force/distance units or pressure units - see discussion below) :l c_t = tangential damping coefficient (force/distance units or pressure units - see discussion below) :l wallstyle = {xplane} or {yplane} or {zplane} or {zcylinder} :l args = list of arguments for a particular style :l {xplane} or {yplane} args = lo hi lo,hi = position of lower and upper plane (distance units), either can be NULL) {zcylinder} args = radius radius = cylinder radius (distance units) :pre zero or more keyword/value pairs may be appended to args :l keyword = {wiggle} :l {wiggle} values = dim amplitude period dim = {x} or {y} or {z} amplitude = size of oscillation (distance units) period = time of oscillation (time units) :pre :ule [Examples:] fix 1 all wall/body/polyhedron 1000.0 20.0 5.0 xplane -10.0 10.0 [Description:] Bound the simulation domain of systems of body particles of style body/rounded/polyhedron with wall(s). All particles in the group interact with the wall when they are close enough to touch it. The nature of the interaction between the wall and the polygons is the same as that between the polygons themselves, which is similar to the Hookean potential. This fix is designed for use with the "body/rounded/polyhedron" body style, which is specified as an argument to the "atom-style body" command. The parameters {k_n}, {c_n}, {c_t} have the same meaning and units as those specified with the "pair_style body/rounded/polyhedron"_pair_body_rounded_polygon.html commands. The {wallstyle} can be planar or cylindrical. The 3 planar options specify a pair of walls in a dimension. Wall positions are given by {lo} and {hi}. Either of the values can be specified as NULL if a single wall is desired. For a {zcylinder} wallstyle, the cylinder's axis is at x = y = 0.0, and the radius of the cylinder is specified. Optionally, the wall can be moving, if the {wiggle} keyword is appended. For the {wiggle} keyword, the wall oscillates sinusoidally, similar to the oscillations of particles which can be specified by the "fix move"_fix_move.html command. This is useful in packing simulations of particles. The arguments to the {wiggle} keyword specify a dimension for the motion, as well as it's {amplitude} and {period}. Note that if the dimension is in the plane of the wall, this is effectively a shearing motion. If the dimension is perpendicular to the wall, it is more of a shaking motion. A {zcylinder} wall can only be wiggled in the z dimension. Each timestep, the position of a wiggled wall in the appropriate {dim} is set according to this equation: position = coord + A - A cos (omega * delta) :pre where {coord} is the specified initial position of the wall, {A} is the {amplitude}, {omega} is 2 PI / {period}, and {delta} is the time elapsed since the fix was specified. The velocity of the wall is set to the derivative of this expression. [Restart, fix_modify, output, run start/stop, minimize info:] None of the "fix_modify"_fix_modify.html options are relevant to this fix. No global or per-atom quantities are stored by this fix for access by various "output commands"_Section_howto.html#howto_15. No parameter of this fix can be used with the {start/stop} keywords of the "run"_run.html command. This fix is not invoked during "energy minimization"_minimize.html. [Restrictions:] This fix is part of the BODY package. It is only enabled if LAMMPS was built with that package. See the "Making LAMMPS"_Section_start.html#start_3 section for more info. Any dimension (xyz) that has a wall must be non-periodic. [Related commands:] "pair_style body/rounded/polyhedron"_pair_body_rounded_polygon.html [Default:] none
doc/src/pair_body_rounded_polygon.txt +2 −2 Original line number Diff line number Diff line Loading @@ -53,8 +53,8 @@ the examples above, or in the data file or restart files read by the "read_data"_read_data.html or "read_restart"_read_restart.html commands: k_n (energy/distance^2) k_na (energy/distance^2) :ul k_n (energy/distance^2 units) k_na (energy/distance^2 units) :ul [Related commands:] Loading
doc/src/pair_body_rounded_polyhedron.txt +2 −2 Original line number Diff line number Diff line Loading @@ -53,8 +53,8 @@ the examples above, or in the data file or restart files read by the "read_data"_read_data.html or "read_restart"_read_restart.html commands: k_n (energy/distance^2) k_na (energy/distance^2) :ul k_n (energy/distance^2 units) k_na (energy/distance^2 units) :ul [Related commands:] Loading
src/BODY/fix_wall_body_polygon.h +3 −1 Original line number Diff line number Diff line Loading @@ -45,7 +45,9 @@ class FixWallBodyPolygon : public Fix { protected: int wallstyle,pairstyle,wiggle,axis; double kn,c_n,c_t; double kn; // normal repulsion strength double c_n; // normal damping coefficient double c_t; // tangential damping coefficient double lo,hi,cylradius; double amplitude,period,omega; double dt; Loading
