Rheological modelling of viscoelastic fluid in a generic gap of screw pump

In this study, the leakage of a non-Newtonian fluid, i.e. silicone oil, in generic gap was numerically investigated. A CFD tool is used to determine relationship between flow, length and pressure difference. The investigated fluid viscoelastic its properties are modelled by Maxwell equation. model can be precisely define phenomenon stress relaxation. Moreover, comparison viscosity measured data with simplified models shows that best suited for prediction. Furthermore, simulation results showed at low pressures, reduced decreasing angle. However, effect changes increasing relaxation time molecule. To drop, Bagley plot used. confirmed as shear rate increases, elastic drop values increase. addition, flow increases an slenderness ratio.