Abstract
This paper presents the numerical results of the flow of the viscoelastic Giesekus fluid around a cylinder between two plates. An aqueous solution of polyacrylamide (PAA) is taken as the working fluid. A method for determining the nonlinear parameter of the Giesekus model to approximate the viscosity curve is proposed. The developed method is tested on the approximation of experimental data presented in the literature. The parameters of the four-mode Giesekus model for describing the rheological properties of an aqueous solution of polyacrylamide with concentrations from 2,500 to 10,000 ppm are determined based on a set of experimental data.
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