摘要翻译:
我们用格子Boltzmann模拟了在远场流体力学作用下,受约束的运行和翻滚粒子(受最小细菌模型启发)的非平衡稳态。在重力作用下,流体动力相互作用几乎不会扰动没有流体动力相互作用时的稳态,但对于谐波阱中的粒子来说,如果游程长度大于约束长度,这种状态就会发生很大的变化:形成了自组装泵。在Poiseuille流中,被限制在狭窄通道中的粒子也表现出一般的上游通量:不需要手性游动。
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英文标题:
《Run-and-tumble particles with hydrodynamics: sedimentation, trapping and
upstream swimming》
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作者:
R. W. Nash, R. Adhikari, J. Tailleur and M. E. Cates
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最新提交年份:
2010
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分类信息:
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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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:Quantitative Biology 数量生物学
二级分类:Other Quantitative Biology 其他定量生物学
分类描述:Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
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英文摘要:
We simulate by lattice Boltzmann the nonequilibrium steady states of run-and-tumble particles (inspired by a minimal model of bacteria), interacting by far-field hydrodynamics, subject to confinement. Under gravity, hydrodynamic interactions barely perturb the steady state found without them, but for particles in a harmonic trap such a state is quite changed if the run length is larger than the confinement length: a self-assembled pump is formed. Particles likewise confined in a narrow channel show a generic upstream flux in Poiseuille flow: chiral swimming is not required.
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PDF链接:
https://arxiv.org/pdf/1003.1996