K-1211 特異要素を用いた分割型有限要素法による粘弾性流体ダイスウェル流動解析(S17-3 数値シミュレーション)(S17 非ニュートン流体の複雑流路内の流れ)

Abstract

As far as singularity problems of Newtonian fluid analysis are concerned, Georgiou et al. proposed the singular finite element method (SFEM), which used the singular elements that were taken into account the nature of the singularity. We introduced these singular elements to the stress field as well as the velocity and pressure fields, for solving the die swell flow of viscoelastic (single mode Giesekus model) fluids using decoupled finite element method. Introducing the singular element meshes to the stress fields, associating with the previously reported techniques, enabled the prediction of die swell flow at We=100 successfully, and the results showed that wiggles in variable fields were reduced in the vicinity of die lip, compared with the solution using the standard FEM.