An examination of the differential constitutive models under large amplitude oscillatory shear flow

Abstract

The exponential Phan-Tien and Tanner, Giesekus, Leonov, and modified eXtended Pom-Pom models are examined under large amplitude oscillatory shear flows using poly(ethylene oxide) solution. Optimization of the nonlinear adjustable parameters of the individual models is based on Fourier transform coefficients of the largest amplitude oscillatory shear characteristics where both magnitude and phase are taken into account. An efficiency of the individual models is shown for large amplitude oscillatory shear characteristics as well as for steady shear characteristics.