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https://github.com/ParticulateFlow/CFDEMcoupling-PFM.git
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83 lines
2.7 KiB
Plaintext
83 lines
2.7 KiB
Plaintext
#######################################################
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# tutorial case showing coarse graining functionality #
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# Christoph Goniva 08.02.2013 #
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#######################################################
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log ../DEM/log.liggghts
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thermo_log ../DEM/post/thermo.txt
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#######################################################
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# variables #
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#######################################################
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variable cg equal 2
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variable r0 equal 0.00025
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variable nPorg equal 71000
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variable nPscal equal ${nPorg}/(${cg}*${cg}*${cg})
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#######################################################
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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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coarsegraining ${cg}
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boundary m m m
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newton off
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units si
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processors 2 2 1
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#read the restart file
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read_restart ../DEM/post/restart/liggghts.restart_coarseGraining_${cg}
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#_coarseGraining_${cg}
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neighbor 0.001 bin
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neigh_modify delay 0
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#Material properties required for granular pair styles
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fix m1 all property/global youngsModulus peratomtype 5.e6
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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, gravity
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timestep 0.00001
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fix gravi all gravity 9.81 vector 0.0 0.0 -1.0
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#walls
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fix zwalls1 all wall/gran model hertz tangential history primitive type 1 zplane 0.0
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fix zwalls2 all wall/gran model hertz tangential history primitive type 1 zplane 0.0553
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fix cylwalls all wall/gran model hertz tangential history primitive type 1 zcylinder 0.01385 0. 0.
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#cfd coupling
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fix cfd all couple/cfd couple_every 100 mpi
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fix cfd2 all couple/cfd/force #/implicit
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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
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#center of mass
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compute centerOfMass all com
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#compute total dragforce
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#compute dragtotal all reduce sum f_dragforce[1] f_dragforce[2] f_dragforce[3]
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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 c_centerOfMass[3] #c_dragtotal[1] c_dragtotal[2] c_dragtotal[3]
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thermo 10
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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 myDump all stl 1 post/dump_*.stl
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dump dmp all custom 1000 ../DEM/post/dump*.liggghts_restart id type x y z vx vy vz fx fy fz radius
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undump myDump
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run 1
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