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萤火之森1992

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[求助] LAMMPS温度阻尼系数影响热导率 已有1人参与

我用LAMMPS自带的例子文件夹中kappa文件夹下的in.langevin计算时,发现温度阻尼系数的不同对热导率的影响很大,请问我应该怎么调这个参数,怎样才能判断调的对不对呢?@oxox6085
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brucefan

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【答案】应助回帖

感谢参与,应助指数 +1
Plot the results with different values of that parameter in the same figure and see if they converge. Kappa should not be sensitive to that parameter if it is chosen in an appropriate range. I think theoretically, the larger the time constant (with weaker coupling to thermostat) , the better the results. But the simulation time needed to achieve steady state (with well-defined temperature gradient) may also increase with increasing time constant, making the computation more time consuming. Good luck to you!
2楼2016-05-03 21:03:21
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