Brownian transport in corrugated channels with inertia
Brownian transport in corrugated channels with inertia
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DOI：
10.1103/physreve.86.021112
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发表时间：
2012-08-13
影响因子：
2.4
通讯作者：
Schmid, G.
中科院分区：
文献类型：
--
作者：
Ghosh, P. K.;Haenggi, P.;Schmid, G.
在有限阻尼条件下，数值研究了悬浮布朗粒子在沿着波纹窄通道中的输运。我们发现，惯性修正不能被忽略，只要通道瓶颈的宽度小于一个适当的粒子扩散长度，这取决于通道的宽度和驱动强度。由于这样的扩散长度与阻尼常数成反比，通过足够窄的障碍物的传输被证明总是对悬浮液的粘度敏感。的惯性修正的运输量词，流动性和扩散率明显不同的平滑和急剧波纹通道。
Transport of suspended Brownian particles de driven along corrugated narrow channels is numerically investigated in the regime of finite damping. We show that inertial corrections cannot be neglected as long as the width of the channel bottlenecks is smaller than an appropriate particle diffusion length, which depends on the the channel corrugation and the drive intensity. With such a diffusion length being inversely proportional to the damping constant, transport through sufficiently narrow obstructions turns out to be always sensitive to the viscosity of the suspension fluid. The inertia corrections to the transport quantifiers, mobility, and diffusivity markedly differ for smoothly and sharply corrugated channels.