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[求助]
計(jì)算石墨烯熱導(dǎo)率平衡態(tài),求助! 已有2人參與
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如題,我想用lammps計(jì)算石墨烯的平衡態(tài)熱導(dǎo)率,我用ms建立16*16*1的石墨烯模型,邊界條件如果是ppp,則運(yùn)行沒(méi)有問(wèn)題,如果改為pps,則總是出現(xiàn)如下錯(cuò)誤: cannot use neighbor bins -box size << cutoff (../neighbor.cpp:1737) 按照l(shuí)ammps error中的提示,顯示 Cannot use neighbor bins - box size << cutoffToo many neighbor bins will be created. This typically happens when the simulation box is very small in some dimension, compared to the neighbor cutoff. Use the “nsq” style instead of “bin” style. 我嘗試著將我的box設(shè)置大一點(diǎn),從16*16*1改為50*50*1,可是錯(cuò)誤依然存在。勢(shì)函數(shù)采用的是tersoff勢(shì)函數(shù)。 部分in文件如下: units metal variable T equal 300 # in K variable V equal vol # in A^3 variable dt equal 0.0005 # in ps variable p equal 100000 # correlation length variable s equal 1 # sample interval variable d equal $p*$s # dump interval # convert from LAMMPS real units to SI # donot change this part variable kB equal 1.3806504e-23 # [J/K] Boltzmann variable eV2J equal 1.60217646e-19 variable A2m equal 1.0e-10 variable ps2s equal 1.0e-12 variable convert equal ${eV2J}*${eV2J}/${ps2s}/${A2m} # setup problem #dimension 3 #boundary p p p #lattice fcc 5.376 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1 #region box block 0 4 0 4 0 4 #create_box 1 box #create_atoms 1 box #mass 1 39.948 #pair_style lj/cut 13.0 #pair_coeff * * 0.010325 3.405 #timestep ${dt} #thermo $d # for reading data file # read structure from data file dimension 3 boundary p p s read_data data.graphite #potential function pair_style tersoff pair_coeff * * SiC.tersoff Si timestep ${dt} thermo $d |
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