摘要翻译:
在最近的模拟和滑行细菌聚集实验的推动下,我们研究了二维自推进硬棒在基底上的集体动力学模型。这些杆具有有限的尺寸,通过排除体积相互作用,它们的动力学因与基底的相互作用而过阻尼。从含有非热噪声源的微观模型出发,导出了系统的连续介质描述。然后用流体力学方程来表征系统的可能稳态,以及它们的稳定性随粒子堆积分数和自推进速度的变化。
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英文标题:
《Hydrodynamics of self-propelled hard rods》
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作者:
Aparna Baskaran and M. Cristina Marchetti
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Soft Condensed Matter 软凝聚态物质
分类描述:Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜,聚合物,液晶,玻璃,胶体,颗粒物质
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一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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英文摘要:
Motivated by recent simulations and by experiments on aggregation of gliding bacteria, we study a model of the collective dynamics of self-propelled hard rods on a substrate in two dimensions. The rods have finite size, interact via excluded volume and their dynamics is overdamped by the interaction with the substrate. Starting from a microscopic model with non-thermal noise sources, a continuum description of the system is derived. The hydrodynamic equations are then used to characterize the possible steady states of the systems and their stability as a function of the particles packing fraction and the speed of self propulsion.
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PDF链接:
https://arxiv.org/pdf/708.2401