Experimental and numerical investigations for vane flow (English shop)

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This dissertation by Alejandro Peugnet investigates the flow behavior of Newtonian and non-Newtonian fluids in a vane-in-cup measuring system. The research examines the conditions under which a rotating vane can reliably determine fluid viscosity. Experimental investigations involving aqueous solutions of polyacrylamide, hydroxypropyl guar, and xanthan gum are combined with numerical flow simulations. Particle Image Velocimetry (PIV) is employed to measure velocity profiles, which are compared with computational results based on the finite volume method. The study develops a relationship between rotational velocity and shear rate and evaluates the suitability of vane geometry for viscosity measurements. The findings demonstrate that reliable viscosity measurements are possible at low Reynolds numbers, while fluid elasticity and inertial effects limit the applicability of vane rheometry.