聚合物流体的多尺度拉格朗日流体动力学模拟
Multiscale Lagrangian Fluid Dynamics Simulation for Polymeric Fluid
摘要：
我们已经开发了一种多尺度拉格朗日流体动力学的模拟技术，以解决与聚合物流体的历史依赖性有关的分层问题。本文采用拉格朗日粒子流体动力学技术（改进的光滑粒子流体动力学）和随机粗粒聚合物模拟器（哑铃模型）相结合的多尺度模拟方法研究了稀聚合物流体的流动动力学。我们已经证实，我们的方法是很好地与哑铃模型对应的本构方程所获得的宏观结果一致，所观察到的微观热波动出现在宏观流体动力学的色散现象。
英文摘要：
We have developed a simulation technique of multiscale Lagrangian fluid dynamics to tackle hierarchical problems relating to historical dependency of polymeric fluid. We investigate flow dynamics of dilute polymeric fluid by using the multiscale simulation approach incorporating Lagrangian particle fluid dynamics technique (the modified smoothed particle hydrodynamics) with stochastic coarse-grained polymer simulators (the dumbbell model). We have confirmed that our approach is nicely in agreement with the macroscopic results obtained by a constitutive equation corresponding to the dumbbell model, and observed microscopic thermal fluctuation appears in macroscopic fluid dynamics as dispersion phenomena.
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