25b57b978c
Consists of a comparison of the angular velocity damping when the two- way coupling is considered.
88 lines
2.6 KiB
Plaintext
88 lines
2.6 KiB
Plaintext
#echo both
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log ../DEM/log.liggghts
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thermo_log ../DEM/post/thermo.txt
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variable deltat equal 5e-05
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atom_style sphere
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atom_modify map array sort 0 0
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boundary m m m
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newton off
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communicate single vel yes
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processors 1 4 1
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units si
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region reg block 0 0.025 0 0.1 0 0.025 units box
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create_box 1 reg
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neighbor 0.1 bin
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neigh_modify delay 0 binsize 0.01
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#Material properties required for granular pair styles
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fix m1 all property/global youngsModulus peratomtype 5e05
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fix m2 all property/global poissonsRatio peratomtype 0.45
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fix m3 all property/global coefficientRestitution peratomtypepair 1 0.3
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fix m4 all property/global coefficientFriction peratomtypepair 1 0.5
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#pair style
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pair_style gran model hertz tangential history #Hertzian without cohesion
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pair_coeff * *
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timestep ${deltat}
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fix gravi all gravity 9.81 vector 0.0 -1.0 0.0
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#walls
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fix xwall1 all wall/gran model hertz tangential history primitive type 1 xplane 0.
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fix xwall2 all wall/gran model hertz tangential history primitive type 1 xplane 0.025
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fix zwall1 all wall/gran model hertz tangential history primitive type 1 zplane 0.
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fix zwall2 all wall/gran model hertz tangential history primitive type 1 zplane 0.025
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fix ywall1 all wall/gran model hertz tangential history primitive type 1 yplane 0.
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fix ywall2 all wall/gran model hertz tangential history primitive type 1 yplane 0.1
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# cfd coupling
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fix cfd all couple/cfd couple_every 10 mpi
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fix cfd2 all couple/cfd/force
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# create atoms for simulation
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create_atoms 1 single 0.0125 0.075 0.0125 units box
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set atom 1 diameter 0.01 density 1.1 vx 0 vy 0 vz 0 omegaz 10
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# Setting the angular velocities to print out
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variable omega1 equal omegax[1]
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variable omega2 equal omegay[1]
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variable omega3 equal omegaz[1]
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# Setting the particle position to print out
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variable x1 equal x[1]
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variable y1 equal y[1]
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variable z1 equal z[1]
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variable time equal step*dt
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fix extra1 all print 10 "${time} ${x1} ${y1} ${z1}" file ../DEM/position.txt screen no
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fix extra2 all print 10 "${time} ${omega1} ${omega2} ${omega3}" file ../DEM/angular_velocity.txt screen no
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#integrator for multisphere rigid bodies
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fix integr all nve/sphere
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# screen output
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compute rke all erotate/sphere
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thermo_style custom step atoms ke c_rke vol
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thermo 1000
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thermo_modify lost ignore norm no
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compute_modify thermo_temp dynamic yes
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# insert the first particles so that dump is not empty
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dump dmp1 all custom 100 ../DEM/post/dump.liggghts_run id type x y z vx vy vz omegax omegay omegaz radius fx fy fz
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#force : f_couple_cfd[0] f_couple_cfd[1] f_couple_cfd[2]
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#node : f_couple_cfd[6]
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#cell id : f_couple_cfd[7]
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run 1
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