急縮小・急拡大部を流動する粘弾性流体の最適数値モデルの検討

抄録

Viscoelastic fluids have the characteristic of both viscosity and elasticity, and their physical characteristics are very complicated. As familiar examples of them, there are toothpaste, paint, mayonnaise, concrete, and etc. Various constitutive equations in the past decades have been proposed to describe such kind of fluids theoretically, and the proposed equations are aimed to be applied in the piping design in production plants. However, it is difficult to show the real flow behavior of viscoelastic fluid by numerical analysis, and many unsolved subjects are left behind to restraint their practical applications. To solve this problem, in this study, fundamental steady flow behavior characteristics of viscoelastic fluid at low Reynolds numbers is investigated by numerical analysis assuming Giesekus model and applying the viscosity with shear-thinning.