diff --git a/examples/granular/in.pour.drum b/examples/granular/in.pour.drum new file mode 100644 index 0000000000..edfb95117f --- /dev/null +++ b/examples/granular/in.pour.drum @@ -0,0 +1,98 @@ +# pour two types of particles (cohesive and non-cohesive) into cylinder +# 'turn' cylinder by changing direction of gravity, then rotate it. +# This simulates a rotating drum powder characterization experiment. + +variable name string rotating_drum_two_types + +atom_style sphere +units lj + +############################################### +# Geometry-related parameters +############################################### + +variable boxx equal 30 +variable boxy equal 30 +variable boxz equal 50 + +variable drum_rad equal ${boxx}*0.5 +variable drum_height equal 20 + +variable xc equal 0.5*${boxx} +variable yc equal 0.5*${boxx} +variable zc equal 0.5*${boxz} + +############################################### +# Particle-related parameters +############################################### +variable rlo equal 0.25 +variable rhi equal 0.5 +variable dlo equal 2.0*${rlo} +variable dhi equal 2.0*${rhi} + +variable cyl_rad_inner equal ${drum_rad}-1.1*${rhi} + +variable dens equal 1.0 + +variable skin equal 0.3*${rhi} + +############# + +region boxreg block 0 ${boxx} 0 ${boxy} 0 ${boxz} +create_box 2 boxreg +change_box all boundary p p f + +comm_modify vel yes + +variable theta equal 0 + +region curved_wall cylinder z ${xc} ${yc} ${drum_rad} 0 ${drum_height} side in rotate v_theta ${xc} ${yc} 0 0 0 1 +region bottom_wall plane ${xc} ${yc} 0 0 0 1 side in rotate v_theta ${xc} ${yc} 0 0 0 1 + +region insreg cylinder z ${xc} ${yc} ${cyl_rad_inner} ${drum_height} ${boxz} + +fix 1 all nve/sphere +fix grav all gravity 10 vector 0 0 -1 +fix ins1 all pour 2000 1 1234 region insreg diam range ${dlo} ${dhi} dens ${dens} ${dens} +fix ins2 all pour 2000 2 1234 region insreg diam range ${dlo} ${dhi} dens ${dens} ${dens} + +comm_modify vel yes + +neighbor ${skin} bin +neigh_modify delay 0 every 1 check yes + +pair_style granular +pair_coeff 1 * hertz/material 1e5 0.2 0.3 tangential mindlin NULL 1.0 0.5 damping tsuji +pair_coeff 2 2 jkr 1e5 0.1 0.3 50 tangential mindlin NULL 1.0 0.5 rolling sds 1e3 1e3 0.1 twisting marshall damping tsuji + +fix 3 all wall/gran/region granular hertz/material 1e5 0.1 0.3 tangential mindlin NULL 1.0 0.5 damping tsuji region curved_wall +fix 4 all wall/gran/region granular hertz/material 1e5 0.1 0.3 tangential mindlin NULL 1.0 0.5 damping tsuji region bottom_wall + +thermo_style custom step cpu atoms ke v_theta +thermo_modify lost warn +thermo 100 + +timestep 0.001 + +dump 1 all custom 100 ${name}.dump id type radius mass x y z + +#For removal later +compute 1 all property/atom radius +variable zmax atom z+c_1>0.5*${drum_height} +group delgroup dynamic all var zmax every 10000 + +run 10000 + +#Remove any particles that are above z > 0.5*drum_height +delete_atoms group delgroup + +#Add top lid +region top_wall plane ${xc} ${yc} ${drum_height} 0 0 -1 side in rotate v_theta ${xc} ${yc} 0 0 0 1 +fix 5 all wall/gran/region granular hertz/material 1e5 0.1 0.3 tangential mindlin NULL 1.0 0.5 damping tsuji region top_wall + +# 'Turn' drum by switching the direction of gravity +unfix grav +fix grav all gravity 10 vector 0 -1 0 + +variable theta equal 2*PI*elapsed/20000.0 +run 30000 \ No newline at end of file diff --git a/examples/granular/in.pour.flatwall b/examples/granular/in.pour.flatwall new file mode 100644 index 0000000000..a829d98e16 --- /dev/null +++ b/examples/granular/in.pour.flatwall @@ -0,0 +1,67 @@ +# pour two types of particles (cohesive and non-cohesive) on flat wall + +variable name string pour_two_types + +atom_style sphere +units lj + +############################################### +# Geometry-related parameters +############################################### + +variable boxx equal 20 +variable boxy equal 20 +variable boxz equal 30 + +variable xc1 equal 0.3*${boxx} +variable xc2 equal 0.7*${boxx} +variable yc equal 0.5*${boxy} + +############################################### +# Particle-related parameters +############################################### +variable rlo equal 0.25 +variable rhi equal 0.5 +variable dlo equal 2.0*${rlo} +variable dhi equal 2.0*${rhi} + +variable dens equal 1.0 + +variable skin equal 0.3*${rhi} + +############# + +region boxreg block 0 ${boxx} 0 ${boxy} 0 ${boxz} +create_box 2 boxreg +change_box all boundary p p f + +comm_modify vel yes + +region insreg1 cylinder z ${xc1} ${yc} 5 15 ${boxz} +region insreg2 cylinder z ${xc2} ${yc} 5 15 ${boxz} + +fix 1 all nve/sphere +fix grav all gravity 10.0 vector 0 0 -1 +fix ins1 all pour 1500 1 3123 region insreg1 diam range ${dlo} ${dhi} dens ${dens} ${dens} +fix ins2 all pour 1500 2 3123 region insreg2 diam range ${dlo} ${dhi} dens ${dens} ${dens} + +comm_modify vel yes + +neighbor ${skin} bin +neigh_modify delay 0 every 1 check yes + +pair_style granular +pair_coeff 1 * jkr 1000.0 50.0 0.3 10 tangential mindlin 800.0 1.0 0.5 rolling sds 500.0 200.0 0.5 twisting marshall +pair_coeff 2 2 hertz 200.0 20.0 tangential linear_history 300.0 1.0 0.1 rolling sds 200.0 100.0 0.1 twisting marshall + +fix 3 all wall/gran granular hertz/material 1e5 1e3 0.3 tangential mindlin NULL 1.0 0.5 zplane 0 NULL + +thermo_style custom step cpu atoms ke +thermo_modify lost warn +thermo 100 + +timestep 0.001 + +dump 1 all custom 100 ${name}.dump id type radius mass x y z + +run 15000