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CarbonO2鐵蟲 (初入文壇)
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[求助]
lammps nemd計(jì)算熱導(dǎo)率問(wèn)題
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大家好,我在使用nemd計(jì)算帶有凸起的石墨烯熱導(dǎo)率時(shí)(冷熱源均取在凸起上),出現(xiàn)凸起部分有較大溫度變化,但是主體部分溫度幾乎不變的情況,請(qǐng)問(wèn)該如何解決該問(wèn)題?以下為我的in文件 units metal dimension 3 newton on boundary p s s atom_style full neighbor 2.0 nsq neigh_modify delay 2 check yes #processors 4 4 1 #echo log # read data of graphite read_data Result_With_Pillar_y.data #read_restart restart.nve #reset_timestep 0 # define groups # total=5112 group downb id 1:72 group upb id 5041:5112 group source id 73:216 group sink id 4897:5040 group caculate subtract all upb downb source sink group tot subtract all upb downb compute avelength caculate chunk/atom bin/1d y lower 3 # tersoff potential pair_style tersoff pair_coeff * * SiC.tersoff C C #2 atoms types velocity all create 50.0 65877893 mom yes rot yes dist gaussian units box min_style sd minimize 1.0e-10 1.0e-10 10000 10000 dump 0 all custom 500000 dump.*.lammpstrj id type x y z dump 1 all xyz 100000 dump.xyz thermo 50000 thermo_style custom step temp pe ke etotal vol lx ly lz fix 2 upb setforce 0.0 0.0 0.0 fix 3 downb setforce 0.0 0.0 0.0 timestep 0.0005 fix momentum all momentum 1 linear 1 1 1 angular #fix npt all npt temp 50 50 1 iso 1.0 1.0 1 #run 1000000 #write_restart restart.npt #unfix npt fix nvt tot nvt temp 50 50 0.05 drag 0.2 run 2000000 write_restart restart.nvt unfix nvt fix nve tot nve fix 9 all temp/berendsen 50 50 1.0 #fix nvt all langevin 50 50 0.1 36102036 run 2000000 unfix nve write_restart restart.nve fix nve1 tot nve fix 5 source heat 1 1.5 fix 6 sink heat 1 -1.5 fix 7 caculate ave/chunk 50 100 5000 avelength temp file Tprofile.txt run 2000000@smutao@oxox6085 |
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lammps系統(tǒng)學(xué)習(xí)內(nèi)容可以了解一下 https://docs.qq.com/pdf/DWG9YdEloVWxJeWhQ 發(fā)自小木蟲Android客戶端 |
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