Numerical simulation of planar entry flow for a polyisobutylene solution using an integral constitutive equation

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Abstract
Numerical simulations have been undertaken for the entry flow through a 41 planar contraction of a well-characterized shear-thinning polymer solution (polyisobutylene in tetradecane) used previously in an experimental study. The fluid has heen modeled using an integral constitutive equation of the K-BKZ type with a spectrum of four relaxation times. Numerical values for the constants appearing in the equation hav

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