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arXiv 1012.5524cond-mat.soft
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磁流体动力学条件下的胶体悬浮模型

A model for colloidal suspension under magnetohydrodynamic conditions

Qinghua Chen, Bernard Stuyven, Liviu F. Chibotaru, Jan Vermant, Johan Vanacken, Johan A. Martens, Jan Van Humbeeck, Victor V. Moshchalkov

摘要:

我们提出了一个全面的模型来解释悬浮纳米粒子在磁流体动力学条件下的行为。洛伦兹力不仅将纳米颗粒絮凝物拖向壁,减小絮凝物之间的距离,从而导致更负的总对相互作用势能,而且在絮凝物内部产生额外的磁致应力,导致对相互作用距离的变化,从而产生更小的负总势能。该模型很好地解释了最近的实验结果表明,磁场有助于聚集在层流或弱湍流,但有利于絮体破碎在湍流区。

英文摘要:

We present a comprehensive model to account for the behavior of suspended nanoparticles under magnetohydrodynamic conditions. The Lorentz force not only drags nanoparticle flocs toward the walls reducing the distance between flocs resulting a more negative total pair interaction potential energy, but also produces extra magnetic-induced stresses inside a floc leading to a change of pair interaction distance thus giving rise to a less negative total potential energy. The model explains quite well the recent experimental results showing that magnetic field assists aggregation in laminar or weak turbulent flows, but favors floc disruption in turbulent regime.

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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