在中尺度模拟中出现的剪切粘弹性流体中的巨涨落
Giant fluctuations in sheared viscoelastic fluids emerging in a mesoscale simulation
摘要：
已知剪切流在原本透明和均匀的聚合物溶液中引起巨大的密度波动。这种效应源于缠结聚合物网络的弹性，并且可以跨越超过一千条链的距离。它在许多散射实验中被观察到，后来被数学理论解释。在这里，我们从直接粒子模拟的角度来观察这种现象。主要的新颖之处是速度相关的摩擦力，耦合整个系统，并有效地解决了稀疏矩阵代数。我们的极简模型在台式PC上运行，结果与实验吻合得很好。
英文摘要：
Shear flow is known to induce huge density fluctuations in otherwise clear and uniform polymer solutions. This effect is rooted in the elasticity of the entangled polymer network, and can span distances over a thousand chains wide. It has been observed in many scattering experiments, and later explained by mathematical theories. Here we inspect this phenomenon from a direct particle simulation viewpoint. The main novelty is a velocity dependent friction force, coupling the entire system and solved efficiently with sparse matrix algebra. Our minimalist model runs on a desktop PC and the results agree well with experiments.
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。
