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新虫 (小有名气)

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虫号: 1362838
注册: 2011-08-07
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专业: 数论

[求助] Muller-Plath模型的角动量问题

muller-plath在文献中也提到过NEMD模拟中进行的粒子交换，线动量和动能是守恒，但是角动量不守恒，因此整个体系会在交换粒子的过程中转起来，文献中是这么说的（It can be shown that exchanging the velocities of two particles of equal mass leaves the total linear momentum, the total ki-netic energy, and the total energy ~in a conservative system ! unchanged, and that velocity transfer by exchange is the only one which satisfies these conservation laws. The total angu-lar momentum, however, is not conserved. This should nor-mally not be a problem, since, except for vacuum boundary conditions, the angular momentum is anyway not a constant of motion）可是转动的话，会不会有额外的能量呢？请问高手们，此问题是怎么处理的？

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