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LAMMPS (1 Feb 2014)
# SRD viscosity demo - rigid star particles
units lj
atom_style sphere
atom_modify map array first big
dimension 2
# read in clusters of rigid bodies
fix molprop all property/atom mol
read_data data.star fix molprop NULL Molecules
orthogonal box = (-13.2934 -13.2934 -0.5) to (13.2934 13.2934 0.5)
4 by 2 by 1 MPI processor grid
reading atoms ...
270 atoms
set type 1 mass 1.0
270 settings made for mass
group big type 1
270 atoms in group big
velocity big create 1.44 87287 loop geom
# equilibrate big particles
pair_style soft 1.12
pair_coeff 1 1 0.0
pair_coeff 2 2 0.0 0.0
pair_coeff 1 2 0.0 0.0
variable prefactor equal ramp(0,60)
fix soft all adapt 1 pair soft a * * v_prefactor
neighbor 0.3 bin
neigh_modify delay 0 every 1 check yes
fix 1 big rigid molecule
30 rigid bodies with 270 atoms
fix 2 all enforce2d
#dump 1 all atom 10 dump.star.equil
thermo 100
run 1000
Memory usage per processor = 2.64859 Mbytes
Step Temp E_pair E_mol TotEng Press
0 0 0 0 0 0.24721146
100 0 3.291475 0 3.291475 0.69158089
200 0 4.6176595 0 4.6176595 0.71737945
300 0 7.0921814 0 7.0921814 1.2163497
400 0 8.3666709 0 8.3666709 0.50645957
500 0 10.630838 0 10.630838 0.72764487
600 0 12.42157 0 12.42157 1.0130599
700 0 14.349074 0 14.349074 0.74795509
800 0 16.464746 0 16.464746 1.054549
900 0 18.253108 0 18.253108 0.51551753
1000 0 20.699563 0 20.699563 1.8084662
Loop time of 0.0484946 on 8 procs for 1000 steps with 270 atoms
Pair time (%) = 0.00250834 (5.17242)
Neigh time (%) = 0.000999629 (2.06132)
Comm time (%) = 0.0154877 (31.9369)
Outpt time (%) = 0.000273734 (0.564464)
Other time (%) = 0.0292252 (60.2649)
Nlocal: 33.75 ave 42 max 22 min
Histogram: 1 0 1 0 0 2 0 1 1 2
Nghost: 23.375 ave 30 max 14 min
Histogram: 1 0 1 0 0 2 1 0 1 2
Neighs: 52.25 ave 69 max 27 min
Histogram: 1 0 1 0 1 0 1 1 1 2
Total # of neighbors = 418
Ave neighs/atom = 1.54815
Neighbor list builds = 176
Dangerous builds = 0
#undump 1
unfix soft
unfix 1
unfix 2
# add small particles as hi density lattice
region plane block INF INF INF INF -0.001 0.001 units box
lattice sq 85.0
Lattice spacing in x,y,z = 0.108465 0.108465 0.108465
create_atoms 2 region plane
Created 60025 atoms
set type 2 mass 0.1
60025 settings made for mass
group small type 2
60025 atoms in group small
velocity small create 1.0 593849 loop geom
# delete overlaps
# must set 1-2 cutoff to non-zero value
pair_style lj/cut 2.5
pair_coeff 1 1 1.0 1.0
pair_coeff 2 2 0.0 1.0 0.0
pair_coeff 1 2 0.0 1.0 0.5
delete_atoms overlap 0.5 small big
Deleted 16305 atoms, new total = 43990
# SRD run
reset_timestep 0
neighbor 0.3 bin
neigh_modify delay 0 every 1 check yes
communicate multi group big vel yes
neigh_modify include big
# no pairwise interactions with small particles
pair_style lj/cut 2.5
pair_coeff 1 1 1.0 1.0
pair_coeff 2 2 0.0 1.0 0.0
pair_coeff 1 2 0.0 1.0 0.0
# use fix SRD to push small particles out from inside big ones
# if comment out, big particles won't see SRD particles
timestep 0.001
fix 1 big rigid molecule
30 rigid bodies with 270 atoms
fix 2 small srd 20 big 1.0 0.25 49894 shift yes 54979 search 0.2 collision slip inside ignore overlap yes
fix 3 small viscosity 10 x y 50
fix 4 all enforce2d
# diagnostics
compute tbig big temp/sphere
variable pebig equal pe*atoms/count(big)
variable ebig equal etotal*atoms/count(big)
thermo_style custom step temp f_2[8] etotal v_pebig v_ebig press f_2[1] f_2[2] f_2[3] f_2[4] f_2[5] f_2[6] f_2[7] f_2[8] f_2[9] f_2[10] f_2[11] f_2[12]
thermo_modify temp tbig
WARNING: Temperature for thermo pressure is not for group all (../thermo.cpp:439)
thermo 1000
#dump 1 all atom 1000 dump.star.mp
#dump 1 all image 1000 image.*.jpg type type zoom 1.6
#dump_modify 1 pad 6 adiam 1 1 adiam 2 0.2
run 100000
SRD info:
SRD/big particles = 43720 270
big particle diameter max/min = 1 1
SRD temperature & lamda = 1 0.0632456
SRD max distance & max velocity = 0.252982 12.6491
SRD grid counts: 106 106 1
SRD grid size: request, actual (xyz) = 0.25, 0.250819 0.250819 1
SRD per actual grid cell = 5.55866
SRD viscosity = 0.235582
big/SRD mass density ratio = 0.144099
WARNING: Fix srd grid size > 1/4 of big particle diameter (../fix_srd.cpp:2875)
# of rescaled SRD velocities = 0
ave/max small velocity = 4.19085 7.72582
ave/max big velocity = 2.20262 5.4168
Memory usage per processor = 7.83759 Mbytes
Step Temp 2[8] TotEng pebig ebig Press 2[1] 2[2] 2[3] 2[4] 2[5] 2[6] 2[7] 2[8] 2[9] 2[10] 2[11] 2[12]
0 18.299191 0 0.25067776 37.859815 40.841906 5.7680841 0 0 0 0 0 0 0 0 0 0 0 0
1000 1.3197888 8196 0.2296966 37.208454 37.42353 7.4694369 14388 59 59 0 707 57680 11236 8196 1.0259754 0 5 0
2000 1.5789784 8192 0.22993088 37.204387 37.461702 7.6252927 14352 56 56 0 1521 57680 11236 8192 1.0168955 0 7 0
3000 1.286186 8153 0.2296947 37.213621 37.423222 8.8624394 14533 73 73 0 2299 57680 11236 8153 1.0109574 0 7 0
4000 2.0862082 8194 0.23044604 37.20566 37.545635 7.8064365 14228 48 48 0 3068 57680 11236 8194 1.0046224 0 7 0
5000 1.892401 8172 0.23019301 37.196017 37.504409 7.9041579 14290 55 55 0 3866 57680 11236 8172 1.005673 0 7 0
6000 2.1063411 8138 0.23041636 37.197543 37.540799 4.8468885 13803 47 47 0 4638 57680 11236 8138 1.0083722 0 7 0
7000 2.3549938 8174 0.23071159 37.205123 37.5889 6.5703154 13773 58 58 0 5398 57680 11236 8174 1.0039365 0 7 0
8000 3.0660305 8216 0.23155654 37.226914 37.726563 11.977404 13898 65 65 0 6180 57680 11236 8216 0.99586836 0 7 0
9000 3.1510761 8203 0.23143756 37.19367 37.707178 7.2978028 13815 54 54 0 6985 57680 11236 8203 0.99794556 0 7 0
10000 2.7472522 8196 0.23096076 37.181796 37.629496 11.336568 14012 59 59 0 7812 57680 11236 8196 0.99210203 0 11 0
11000 2.1776587 8186 0.23038876 37.181424 37.536302 9.2106614 14063 64 64 0 8627 57680 11236 8186 1.003993 0 11 0
12000 3.0146734 8196 0.2312123 37.179198 37.670478 5.9303705 14077 60 60 0 9436 57680 11236 8196 0.98496016 0 23 0
13000 3.0029829 8179 0.23150759 37.229214 37.718589 7.3329148 14116 74 74 0 10339 57680 11236 8179 1.0039911 0 23 0
14000 3.2942972 8191 0.23166868 37.207985 37.744833 9.6428846 14019 56 57 0 11290 57680 11236 8191 0.99410574 0 23 0
15000 3.8480961 8213 0.23228155 37.217589 37.844686 2.1025549 13746 68 68 0 12175 57680 11236 8213 1.0011325 0 23 0
16000 3.2573043 8195 0.2316418 37.209634 37.740454 8.1255708 13682 55 55 0 13104 57680 11236 8195 1.0061399 0 23 0
17000 3.3579037 8186 0.2315443 37.177356 37.72457 9.8606039 13833 54 54 0 14034 57680 11236 8186 1.004156 0 23 0
18000 4.7903055 8194 0.23307181 37.192799 37.973441 3.8090185 13914 55 55 1 15012 57680 11236 8194 0.98633014 0 23 0
19000 4.4696839 8183 0.23293212 37.222288 37.950681 7.1931333 13499 54 54 0 15960 57680 11236 8183 0.98359656 0 23 0
20000 5.0239019 8126 0.23355887 37.234085 38.052794 5.1504203 13600 58 58 0 16972 57680 11236 8126 0.98555755 0 23 0
21000 4.6595948 8155 0.23275722 37.162845 37.922186 9.0375076 13965 73 74 0 17966 57680 11236 8155 0.99574348 0 23 0
22000 4.043444 8124 0.23247599 37.217434 37.876366 3.9265975 13584 53 53 2 18989 57680 11236 8124 0.9943952 0 23 0
23000 4.9981028 8127 0.23314549 37.170939 37.985445 4.2352191 13589 47 47 0 19958 57680 11236 8127 0.99276741 0 47 0
24000 4.7542655 8145 0.23295434 37.179533 37.954302 7.365415 13753 51 51 0 20955 57680 11236 8145 0.99024306 0 47 0
25000 4.2987054 8177 0.23252979 37.184601 37.885131 10.735771 13536 58 58 0 21994 57680 11236 8177 0.99215977 0 47 0
26000 4.4136261 8170 0.23331629 37.294015 38.013272 14.25925 13842 58 58 0 22979 57680 11236 8170 0.99283174 0 47 0
27000 4.0546007 8173 0.23283443 37.274016 37.934766 6.22969 13877 51 51 0 23997 57680 11236 8173 0.98496361 0 47 0
28000 4.5919614 8151 0.23364384 37.318319 38.066638 4.9917488 13836 60 61 1 25071 57680 11236 8151 0.99390956 0 47 0
29000 4.8025535 8189 0.23313849 37.201667 37.984305 4.7895172 13978 46 47 0 26121 57680 11236 8189 0.99018295 0 47 0
30000 4.2835226 8139 0.23247583 37.178284 37.87634 8.994878 13988 61 61 0 27141 57680 11236 8139 0.98735471 0 47 0
31000 5.4049428 8133 0.23373767 37.201121 38.081927 7.6419291 13771 58 58 0 28207 57680 11236 8133 0.98354883 0 47 0
32000 5.0299584 8177 0.23336211 37.201041 38.020738 8.1206741 14036 55 55 0 29303 57680 11236 8177 0.98239013 0 47 0
33000 4.2993816 8158 0.23320229 37.29406 37.9947 10.745167 13583 51 51 0 30344 57680 11236 8158 0.98952524 0 47 0
34000 5.8334257 8179 0.23458355 37.269109 38.219741 11.094625 13921 62 62 0 31432 57680 11236 8179 0.98822406 0 47 0
35000 6.481318 8168 0.23501133 37.233224 38.289439 7.9397445 13942 56 56 0 32518 57680 11236 8168 0.98830425 0 47 0
36000 4.967891 8186 0.23366927 37.261199 38.070782 8.3979019 13952 51 51 0 33626 57680 11236 8186 0.99579665 0 47 0
37000 5.3458808 8145 0.2337339 37.210132 38.081312 5.4177865 13659 55 55 0 34715 57680 11236 8145 1.0009582 0 47 0
38000 6.3597955 8159 0.23479285 37.217431 38.253842 6.1408411 13754 55 56 0 35754 57680 11236 8159 0.98853252 0 47 0
39000 6.1217173 8195 0.23447066 37.203737 38.20135 9.6016075 13756 70 70 0 36807 57680 11236 8195 0.98652299 0 47 0
40000 5.0218059 8159 0.23370899 37.258886 38.077254 6.6460004 13603 56 56 1 37933 57680 11236 8159 0.98674585 0 47 0
41000 5.5873722 8138 0.23429215 37.26173 38.172265 1.4183057 13634 51 52 1 39050 57680 11236 8138 0.98833769 0 47 0
42000 5.5502013 8170 0.23405343 37.228895 38.133372 7.8338637 13913 72 72 0 40105 57680 11236 8170 0.99124609 0 47 0
43000 4.6854143 8161 0.23326283 37.241013 38.004562 7.857085 13759 48 48 0 41187 57680 11236 8161 0.99649848 0 47 0
44000 6.3172352 8180 0.2348893 37.240081 38.269557 12.59288 13810 55 55 0 42292 57680 11236 8180 0.99164669 0 47 0
45000 6.1213322 8166 0.23449878 37.208381 38.205931 6.3760889 13854 48 49 0 43406 57680 11236 8166 0.98981447 0 47 0
46000 5.0015874 8195 0.23354809 37.235965 38.051038 10.992836 13962 62 62 0 44527 57680 11236 8195 0.99128184 0 47 0
47000 5.0499615 8190 0.23376151 37.262854 38.085811 8.7985849 14105 64 64 0 45653 57680 11236 8190 0.99020272 0 47 0
48000 5.202255 8170 0.23400688 37.278013 38.125788 4.7389097 13754 51 51 0 46705 57680 11236 8170 0.98792999 0 47 0
49000 5.6144741 8167 0.23429848 37.258346 38.173297 6.3247626 13953 51 51 1 47846 57680 11236 8167 0.99270232 0 47 0
50000 6.3027505 8145 0.2347122 37.213588 38.240703 6.4424496 13843 59 59 0 49061 57680 11236 8145 0.99810926 0 47 0
51000 5.2050769 8154 0.23390178 37.26043 38.108665 6.6143765 13999 51 51 0 50075 57680 11236 8154 0.99525977 0 47 0
52000 5.4749884 8175 0.23418567 37.262697 38.154917 8.7256782 13916 51 51 0 51249 57680 11236 8175 0.99508289 0 47 0
53000 5.1367735 8158 0.23393299 37.276645 38.113748 9.3248422 13910 41 41 0 52381 57680 11236 8158 0.98956839 0 47 0
54000 4.8680584 8211 0.23402832 37.335968 38.129281 4.8979582 14214 63 64 0 53439 57680 11236 8211 0.98838908 0 47 0
55000 4.6223848 8167 0.23347097 37.285196 38.038473 6.1898955 14162 46 46 0 54504 57680 11236 8167 0.97935238 0 47 0
56000 4.9075747 8168 0.23409393 37.340218 38.139971 12.20686 13980 60 60 0 55540 57680 11236 8168 0.99885966 0 47 0
57000 4.8736147 8143 0.23354696 37.256636 38.050854 3.9348529 13857 59 59 0 56680 57680 11236 8143 0.98434054 0 47 0
58000 5.6134201 8162 0.23393276 37.198932 38.113711 3.7493067 13866 55 55 2 57767 57680 11236 8162 0.99041155 0 47 0
59000 5.440371 8197 0.23353392 37.162151 38.04873 4.1297786 13748 67 67 0 58894 57680 11236 8197 0.98824623 0 47 0
60000 5.2754075 8148 0.23359083 37.198307 38.058003 7.1427242 13781 55 55 0 60028 57680 11236 8148 0.9831827 0 47 0
61000 5.8228233 8153 0.23438274 37.23812 38.187025 8.8839625 14019 48 48 0 61204 57680 11236 8153 0.98566731 0 47 0
62000 5.7623285 8129 0.23480056 37.316052 38.255098 9.992341 13791 67 68 0 62385 57680 11236 8129 0.97338459 0 47 0
63000 6.095315 8178 0.23455792 37.222257 38.215567 10.722535 14210 54 54 0 63448 57680 11236 8178 0.98135973 0 47 0
64000 5.2494942 8189 0.23380158 37.236866 38.092339 4.4010329 13869 51 51 0 64538 57680 11236 8189 0.98071569 0 47 0
65000 5.6534858 8151 0.23405328 37.212039 38.133348 8.9144953 14065 53 53 0 65661 57680 11236 8151 0.99589337 0 47 0
66000 5.3999138 8165 0.23453061 37.33113 38.211116 7.3102657 13994 61 62 0 66785 57680 11236 8165 0.98715854 0 47 0
67000 6.3619419 8183 0.23459518 37.184875 38.221636 4.0425684 13859 49 49 0 67944 57680 11236 8183 0.98479883 0 47 0
68000 6.2170116 8157 0.23470153 37.225822 38.238965 9.3090925 13598 50 50 0 69121 57680 11236 8157 0.98683618 0 47 0
69000 6.8545121 8179 0.23542272 37.239433 38.356465 9.4175179 13911 59 59 0 70316 57680 11236 8179 0.99828763 0 47 0
70000 5.1476232 8154 0.23389653 37.268937 38.107809 7.6438157 13882 55 55 0 71380 57680 11236 8154 0.99088995 0 47 0
71000 5.9284504 8161 0.23499148 37.320087 38.286205 9.1242845 13968 60 60 0 72478 57680 11236 8161 0.98627289 0 47 0
72000 5.8044136 8180 0.23473312 37.298207 38.244111 6.6084298 14066 56 56 0 73653 57680 11236 8180 0.97959812 0 47 0
73000 5.3690655 8148 0.23424676 37.289911 38.16487 8.7025002 14433 55 55 1 74740 57680 11236 8148 0.97949605 0 47 0
74000 4.8144157 8192 0.23361625 37.277572 38.062144 7.6685178 14425 58 58 1 75918 57680 11236 8192 0.98949387 0 47 0
75000 4.9424688 8143 0.23362551 37.258213 38.063652 5.5882668 13938 42 42 0 77080 57680 11236 8143 0.99602516 0 47 0
76000 6.3017203 8178 0.23500247 37.261048 38.287995 5.2760401 13952 47 47 0 78240 57680 11236 8178 0.98484281 0 47 0
77000 5.3086333 8208 0.23389726 37.242817 38.107928 4.034731 14052 47 47 0 79331 57680 11236 8208 0.9896033 0 47 0
78000 6.1152265 8157 0.23546115 37.366171 38.362726 11.521489 13980 58 58 0 80446 57680 11236 8157 0.98562154 0 47 0
79000 6.5034669 8173 0.23569944 37.341726 38.40155 5.0939756 14030 74 74 0 81663 57680 11236 8173 0.98837711 0 47 0
80000 6.1688245 8182 0.23495003 37.274162 38.279451 6.3337593 14292 50 50 0 82872 57680 11236 8182 0.99316806 0 47 0
81000 6.3818913 8189 0.23516767 37.274899 38.314911 9.0232294 14259 56 56 0 84072 57680 11236 8189 0.98467136 0 47 0
82000 6.502454 8171 0.23498158 37.224932 38.284591 7.6685939 13970 63 63 0 85190 57680 11236 8171 0.99511647 0 47 0
83000 7.2245962 8142 0.23564338 37.215075 38.392416 6.0363083 13789 61 61 0 86416 57680 11236 8142 0.99223565 0 47 0
84000 6.3529888 8192 0.23477435 37.215526 38.250828 7.2109855 14062 52 52 0 87555 57680 11236 8192 0.98623425 0 47 0
85000 6.5185235 8177 0.23516364 37.251976 38.314254 5.266764 14325 52 53 0 88732 57680 11236 8177 0.97895516 0 47 0
86000 5.742959 8170 0.23432816 37.242243 38.178133 6.0834874 13922 48 48 0 89836 57680 11236 8170 0.99203022 0 47 0
87000 6.548676 8177 0.23495538 37.213132 38.280324 6.2502744 14147 48 48 0 91035 57680 11236 8177 0.98829721 0 47 0
88000 5.9500587 8193 0.23446634 37.231006 38.200645 6.2196893 13960 44 44 0 92206 57680 11236 8193 0.98956808 0 47 0
89000 5.0591447 8174 0.23386574 37.278339 38.102793 11.164066 14071 54 54 0 93437 57680 11236 8174 0.99827748 0 47 0
90000 6.4930795 8181 0.23544182 37.301445 38.359576 6.6167028 14183 63 63 1 94640 57680 11236 8181 0.99559871 0 47 0
91000 6.489104 8187 0.23523152 37.267829 38.325313 6.4932786 14223 51 51 1 95718 57680 11236 8187 0.99090796 0 47 0
92000 6.3543839 8184 0.23502776 37.256587 38.292116 7.1553807 14265 66 66 1 96903 57680 11236 8184 0.98979354 0 47 0
93000 5.3818591 8195 0.23393122 37.236417 38.11346 7.9445503 14327 70 70 0 98138 57680 11236 8195 1.0030252 0 47 0
94000 5.6818206 8171 0.2343696 37.258958 38.184885 5.7311019 13943 63 63 0 99306 57680 11236 8171 0.99691591 0 47 0
95000 4.8295204 8160 0.23371941 37.291918 38.078951 4.5703653 13682 48 48 1 100491 57680 11236 8160 1.0078235 0 47 0
96000 6.7415726 8191 0.23539566 37.253429 38.352056 11.837168 13783 53 53 1 101761 57680 11236 8191 1.0010125 0 49 0
97000 6.5298825 8160 0.2354153 37.291126 38.355255 7.6012271 13688 65 65 0 103010 57680 11236 8160 0.99694671 0 49 0
98000 6.2804965 8175 0.23496877 37.259015 38.282504 5.4636503 14041 55 55 0 104259 57680 11236 8175 1.0042653 0 49 0
99000 5.7684681 8173 0.2344998 37.26605 38.206096 1.7807753 14082 58 59 0 105418 57680 11236 8173 0.99124491 0 49 0
100000 6.1371898 8170 0.23495644 37.28036 38.280495 7.7665232 13908 53 53 0 106633 57680 11236 8170 0.98281247 0 49 0
Loop time of 34.1892 on 8 procs for 100000 steps with 43990 atoms
Pair time (%) = 0.361362 (1.05695)
Neigh time (%) = 2.01143 (5.88324)
Comm time (%) = 2.27139 (6.64359)
Outpt time (%) = 0.00694269 (0.0203067)
Other time (%) = 29.5381 (86.3959)
Nlocal: 5498.75 ave 6478 max 4726 min
Histogram: 2 0 1 0 1 2 1 0 0 1
Nghost: 52.875 ave 59 max 44 min
Histogram: 1 0 1 0 1 0 1 0 2 2
Neighs: 186.25 ave 293 max 81 min
Histogram: 1 0 1 3 0 0 1 0 0 2
Total # of neighbors = 1490
Ave neighs/atom = 0.0338713
Neighbor list builds = 5000
Dangerous builds = 0
Please see the log.cite file for references relevant to this simulation
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