Rheometry with Non-Rheometric Flows
Speaker
Prof. Wook Ryol Hwang
Professor, School of Mechanical Engineering, Gyeongsang National University, Kor
About this event
Novel industrial rheometric approaches will be introduced for measuring viscoelasticity of a liquid as well as viscosity in complex flow fields. Modeling schemes based on energy dissipation rate will be introduced to establish the relationship between macroscopic flow parameters (torque, pressure drop, rotational speed, flow rate, deflection angle, etc.) and rheometric variables (shear stress, shear rate, shear strain, viscosity, shear modulus, etc.). Starting from the general flow quantification method for both rotational and pressure-driven flows, several application problems will be discussed to measure the viscosity as a function of shear rate and more importantly to measure the viscoelasticity in both linear and non-linear regimes. Example flow fields for viscoelasticity include (1) agitator systems with impellers and a vessel, (2) a viscometer-like system (a rotating object in a liquid pool), (3) general pressure-driven pipe flows.
Host
