Numerical Simulation of Viscoelastic Fluid Flow in the Curvilinear Micro-Channel

摘要

In this paper, three-dimensional direct numerical simulation method (DNS) based on Giesekus constitutive models have been used to simulate viscoelastic fluid flows in a curvilinear micro-channel. For comparison, we also carried out numerical simulations of Newtonian fluid flow in the same channel. The results obtained were in good agreement with experimental results given by Li et al. in the same geometrical size. Through numerical simulations we investigated the basic characteristics of viscoelastic flow in such a geometry and the influence of the curvature. Besides, the physical mechanism of the elastic instability in the curvilinear micro-channel was also discussed.