50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
dimension 2
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units micro
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atom_style sph
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variable R equal 0.5 # radius of sphere micrometers
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variable a equal $R/5 # lattice spacing micrometers
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variable L equal $R*3
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variable T equal 300.
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variable rho_0 equal 1. # density picograms/micrometer^3
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variable c_0 equal 100. # speed of sound micrometers/microsecond
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variable mu equal 1. # dynamic viscosity picogram/(micrometer-microsecond)
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variable h equal $a*4.5 # kernel function cutoff micrometers
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variable mass equal $a*$a*$a*${rho_0}
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variable dt equal 1e-3 # timestep microseconds
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variable skin equal 0.2*$h
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region box block -$L $L -$L $L -0.5 0.5 units box
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create_box 2 box
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lattice sq $a
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create_atoms 1 box
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region sphere sphere 0 0 0 $R units box
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set region sphere type 2
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group fluid type 1
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group sphere type 2
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mass * ${mass}
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set group all sph/rho ${rho_0}
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pair_style sdpd/taitwater/isothermal $T ${mu} 76787 # temperature viscosity random_seed
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pair_coeff * * ${rho_0} ${c_0} ${h}
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fix 1 fluid sph
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fix 2 sphere rigid/meso single
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fix 2d all enforce2d
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neighbor ${skin} bin
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neigh_modify delay 0 every 1 check yes
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timestep ${dt}
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dump dump_id all atom 100 dump.lammpstrj
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thermo 100
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thermo_style custom step time nbuild ndanger
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run 10000
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