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arXiv 1104.3546physics.plasm-phcond-mat.soft
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强耦合尘埃等离子体中粘性系数的计算

Viscosity calculated in simulations of strongly-coupled dusty plasmas with gas friction

Yan Feng, J. Goree, Bin Liu

摘要:

采用朗之万和无摩擦分子动力学方法模拟了强耦合的二维尘埃等离子体。静态粘度$η$和波数依赖性粘度$η(k)$由颗粒随机运动中的微观剪切计算。通过比较两种模拟的$η(k)$结果,验证了最近发展的计算波数依赖粘度$η(k)$的方法。它也被验证的格林-久保关系仍然可以产生一个准确的测量静态粘度$η$在存在的摩擦在尘埃等离子体实验中的适度水平。

英文摘要:

A two-dimensional strongly-coupled dusty plasma is modeled using Langevin and frictionless molecular dynamical simulations. The static viscosity $η$ and the wave-number-dependent viscosity $η(k)$ are calculated from the microscopic shear in the random motion of particles. A recently developed method of calculating the wave-number-dependent viscosity $η(k)$ is validated by comparing the results of $η(k)$ from the two simulations. It is also verified that the Green-Kubo relation can still yield an accurate measure of the static viscosity $η$ in the presence of a modest level of friction as in dusty plasma experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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