Modelling and Simulation of Viscoelastic Flow Instabilities

粘弹性流动不稳定性的模型开发和理论研究有待开展。区域分解和伪谱数值代码将用于探索具有代表性的聚合物加工系统的流动构型的稳定性。主要的重点将是在模拟微观结构的基础上，将这些模型与模拟聚合物流过固体表面的近壁区域的模型耦合起来，以探索壁滑移对流动不稳定性的影响。这项工作有望导致复杂聚合物过程的更稳健和现实的数值模拟。该模型还涉及到含有聚合物添加剂的流体的减阻。

Model development and theoretical studies of viscoelastic flow instabilities are to be carried out. Domain decomposition and pseudospectral numerical codes will be used to explore the stability of flow configurations representative of polymer processing systems. The main focus will be on the coupling of such models to one simulating the near-wall region for polymers flowing past solid surfaces, based on simulated microstructures, to explore the effect of wall slip on flow instabilities. The work is expected to lead to more robust and realistic numerical modeling of complex polymer processes. The modeling also relates to drag reduction from fluids with polymer additives.