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https://github.com/ParticulateFlow/CFDEMcoupling-PFM.git
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96 lines
3.3 KiB
Plaintext
96 lines
3.3 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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atom_style granular
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atom_modify map array
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communicate single vel yes
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boundary f f f
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newton off
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units si
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processors 2 2 1
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region reg block 0. 1. 0. 1. 0. 4. units box
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create_box 1 reg
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neighbor 0.3 bin
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neigh_modify delay 0 binsize 0.01
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# Material properties required for new pair styles
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fix m1 all property/global youngsModulus peratomtype 5.e7
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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 0.9
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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, gravity
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timestep 0.00003
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fix gravi all gravity 981 vector 0.0 0.0 -1.0
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# walls
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fix xwalls1 all wall/gran model hertz tangential history primitive type 1 xplane 0.
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fix xwalls2 all wall/gran model hertz tangential history primitive type 1 xplane 1.
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fix ywalls1 all wall/gran model hertz tangential history primitive type 1 yplane 0.
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fix ywalls2 all wall/gran model hertz tangential history primitive type 1 yplane 1.
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fix zwalls1 all wall/gran model hertz tangential history primitive type 1 zplane 0.
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fix zwalls2 all wall/gran model hertz tangential history primitive type 1 zplane 4.
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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 single partciles
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create_atoms 1 single .5 .5 3.5 units box
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create_atoms 1 single .5 .5 3.16 units box
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set atom 1 diameter 0.167 density 1.5 vx 0 vy 0 vz 0
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set atom 2 diameter 0.167 density 1.5 vx 0 vy 0 vz 0
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variable vx1 equal vx[1]
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variable vy1 equal vy[1]
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variable vz1 equal vz[1]
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variable vx2 equal vx[2]
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variable vy2 equal vy[2]
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variable vz2 equal vz[2]
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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 x2 equal x[2]
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variable y2 equal y[2]
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variable z2 equal z[2]
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variable time equal step*dt
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fix extra1 all print 100 "${time} ${vx1} ${vy1} ${vz1}" file ../DEM/post/velocity_particle_1.txt title "#" screen no
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fix extra2 all print 100 "${time} ${vx2} ${vy2} ${vz2}" file ../DEM/post/velocity_particle_2.txt title "#" screen no
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fix extra3 all print 100 "${time} ${x1} ${y1} ${z1}" file ../DEM/post/position_particle_1.txt title "#" screen no
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fix extra4 all print 100 "${time} ${x2} ${y2} ${z2}" file ../DEM/post/position_particle_2.txt title "#" screen no
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# apply nve integration to all particles that are inserted as single particles
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fix integr all nve/sphere #wenn das ausgeblendet, dann kein vel update
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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 dmp all custom 100 ../DEM/post/dump.liggghts_run id type x y z ix iy iz vx vy vz fx fy fz omegax omegay omegaz radius
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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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