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78 lines
2.6 KiB
Plaintext
78 lines
2.6 KiB
Plaintext
# Pour granular particles into chute container, then induce flow
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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 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
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neighbor 0.0005 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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# heat transfer
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fix ftco all property/global thermalConductivity peratomtype 1. # lambda in [W/(K*m)]
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fix ftca all property/global thermalCapacity peratomtype 1000. # cp in [J/(kg*K)]
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fix heattransfer all heat/gran initial_temperature 300.
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# set particle temperature for the bed
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run 0
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region total block INF INF INF INF INF INF units box
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set region total property/atom Temp 300.
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# change the particles density
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set group all density 2000
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# cfd coupling
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fix cfd all couple/cfd couple_every 25 mpi
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fix cfd2 all couple/cfd/force/implicit
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fix cfd3 all couple/cfd/convection T0 300
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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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dump dmp all custom/vtk 10000 ../DEM/post/dump*.liggghts_run.vtk id type radius x y z vx vy vz fx fy fz f_dragforce[1] f_dragforce[2] f_dragforce[3] f_Temp[0]
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run 1
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