Modelling and Simulation of Viscoelastic Flow Instabilities

将开展粘弹性流动不稳定性的模型开发和理论研究。区域分解和伪谱数值编码将被用来探索代表聚合物加工系统的流动构型的稳定性。基于模拟的微观结构，将这类模型耦合到模拟聚合物流过固体表面的近壁区，以探索壁面滑移对流动不稳定性的影响。预计这项工作将导致对复杂聚合物过程进行更稳健和更现实的数值模拟。该模型还涉及使用聚合物添加剂的流体的减阻问题。

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.