arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0709.3822cond-mat.softcond-mat.stat-mech
收藏

微通道流动中polymer动力学的中尺度模拟

Mesoscale simulations of polymer dynamics in microchannel flows

L. Cannavacciuolo, R. G. Winkler, G. Gompper

摘要:

采用细观尺度数值模拟方法研究了方形微通道内柔性聚合物在Poiffille流作用下的非平衡结构和动力学性质。链长和流动强度系统地变化。两个运输制度,相应的弱约束和强约束。对于强约束,传输特性是独立的聚合物长度。短聚合物的长时间翻滚动力学的分析产生非周期性运动与流动强度的次线性依赖。我们发现构象以及动力学性质的明显差异,从简单的剪切流得到的结果。

英文摘要:

The non-equilibrium structural and dynamical properties of flexible polymers confined in a square microchannel and exposed to a Poiseuille flow are investigated by mesoscale simulations. The chain length and the flow strength are systematically varied. Two transport regimes are identified, corresponding to weak and strong confinement. For strong confinement, the transport properties are independent of polymer length. The analysis of the long-time tumbling dynamics of short polymers yields non-periodic motion with a sublinear dependence on the flow strength. We find distinct differences for conformational as well as dynamical properties from results obtained for simple shear flow.

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。

↑