惯性作用下波纹通道中的布朗输运
Brownian transport in corrugated channels with inertia
摘要：
在有限阻尼条件下，对直流驱动下悬浮布朗粒子沿波纹窄通道的输运进行了数值研究。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。由于这种扩散长度与阻尼常数成反比，因此通过足够窄的障碍物的传输结果总是对悬浮液的粘度敏感。惯性修正的运输量词，流动性和扩散性，明显不同的平滑和急剧波纹通道。
英文摘要：
The transport of suspended Brownian particles dc-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. Being such a diffusion length 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.
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