The influence of fluid - flexible particle interaction on fluid flow optical non-homogeneity in channel bifurcation

8th All-Russian Conference on Low Temperature Plasma in the Processes of Functional Coating Preparation

Tazyukov, F. Kh^1 ; Kutuzova, E.R.^1 ; Garifullin, F.A.^1

Kazan National Research Technological University, 68 Karl Marx street, Kazan

420015, Russia^1

关键词: Elastic properties;    Governing parameters;    Influence of fluid;    Longitudinal strain;    Longitudinal viscosity;    Oldroyd-b models;    Viscosity anomaly;    Weissenberg number;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/789/1/012062/pdf
DOI  :  10.1088/1742-6596/789/1/012062

来源: IOP

【 摘 要 】

In the present paper the peculiar properties of convergent fluid flow in T-junction channel is considered. There is no interaction between flexible particles in the flow. Such kind of situation is described by rheological FENE-P and Oldroyd-B models. The first one predicts viscosity anomaly, dependence of longitudinal viscosity on longitudinal strain rate and elastic properties; the last one - existence of longitudinal viscosity depending on longitudinal strain rateand having a physical sense only for1/(2λ) and elastic properties. The models governing parameters are the Weissenberg number (We), the Reynolds number (Re), the ability of flexible particle to change its orientation and stretching degree (L2) in the main flow. The bifurcation area is of great importance due to possibility of high stresses and velocities existence not only in central area, but also on the walls and near the corners. The symmetry-loss effect at creeping flows regime (Re1) is investigated. It has been showed that at certain set of We and L2values the symmetrical shape of fluid flow turns to asymmetrical shape.