标题： 通过耗散粒子动力学模拟研究蠕虫状胶束溶液的稳态拉伸粘度 显示英文标题

标题： Steady-state extensional viscosity of wormlike micellar solutions via dissipative particle dynamics simulations

摘要： 我们使用耗散粒子动力学模拟研究了蠕虫状胶束溶液的稳态拉伸粘度。 随着拉伸速率的增加，稳态拉伸粘度最初增加，随后在达到最大值后减少，这一现象在实验中已被观察到。 我们揭示了这种非单调行为是由于单轴拉伸流下胶束的拉伸与断裂之间的竞争引起的。 我们进一步提出了一种将拉伸粘度与胶束结构和动力学联系起来的关系。 该关系为不同温度、浓度和拉伸速率下的无缠绕蠕虫状胶束溶液的拉伸粘度提供了一个统一的描述。 显示英文摘要

摘要： We investigate the steady-state extensional viscosity of wormlike micellar solutions using dissipative particle dynamics simulations. As the extension rate increases, the steady-state extensional viscosity initially increases and subsequently decreases after reaching a maximum, as observed in experiments. We reveal that this nonmonotonic behavior arises from the competition between micellar stretching and scission under uniaxial extensional flow. We further propose a relation that connects the extensional viscosity to micellar structures and kinetics. This relation provides a unified description of the extensional viscosity of unentangled wormlike micellar solutions for various temperatures, concentrations, and extension rates.