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chuntao118新蟲 (著名寫手)
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[求助]
MD如何計算 strain rate 已有1人參與
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請問在MD 模擬中如何計算strain rate:定義式子放到附件中。需要的是詳細(xì)的計算過程!或者具體的程序代碼都行?要是軟件的話,請貼出源代碼!不要軟件的命令。謝謝!希望計算過人前輩們多多指教!再次表示感謝! 9C7%PP]M`T7I`IK)EH@68FV.png |
金蟲 (正式寫手)

專家顧問 (著名寫手)
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專家經(jīng)驗: +218 |
| Your question sounds interesting, although I don't if I can of any help regarding your question. I think you are calculating viscosity by NEMD simulations? Could you described your problem in more detail? Also provide some references? Discussing an algorithm is much more interesting than talking about an input script for a software. |
新蟲 (著名寫手)
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我主要想計算一下 Poiseuille flow 中的局部 transport properties (diffusion coefficient, shear viscosity and thermal conductivity); 所謂的局部性質(zhì)主要是對管道進(jìn)行分層,計算不同層之間的傳質(zhì)性質(zhì)。這個問題最早計算的可見?《Variation of transport properties along nanochannels a study by non-equilibrium molecular dynamics》,《Effect of wall roughness on shear viscosity and diffusion in nanochannels》,在該作者的研究中,主要提到:“Shear viscosity in confined nanochannels can be calculated by NEMD or Green–Kubo relations. Green–Kubo methods are mainly used in systems close to or at equilibrium state and they do not take into account the induced strain rates, while NEMD methods do.”,我主要是想實現(xiàn)這一結(jié)果,然后用于討論其他的物質(zhì)體系。實際上,我還有一個問題:Green–Kubo relations是否可以直接用于Poiseuille flow 中的局部 shear viscosity的計算?為什么? |
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