STUDY OF THE PULSATING FLOW BEHAVIOR OF A BIOPOLYMER (HUMAN BLOOD WITH HIGH CHOLESTEROL): SLIP MECHANISMS In this work, a new simplified method to find the fluidity enhancement of a non-Newtonian liquid under a pulsating (time-dependent) pressure gradient is analyzed in the regimen of non-linear viscoelasticity and slip mechanisms at Wall. The apparent viscosity is calculated for the fluid in a capillary, and the fluidity enhancement is predicted by means of a Taylor series expansion of the volumetric flow in a vicinity of the applied wall stress. This expansion is shown to render the same results as several perturbation techniques used at length in the literature. Both new and the conventional perturbation methods are equivalent in their predictions of the fluidity enhancement. Even though the flow and rheology behavior are modelled using a New Exponential Rheological equation of state, which contains as a particular cases the Bautista-Manero-Puig (BMP) constitutive equation. The prediction of the fluidity enhancement does not depend on the constitutive model employed. The only condition for the flow enhancement is a shear thinning behavior. Flow enhancement is predicted using rheological data for blood since this fluid naturally flows under a pulsatile pressure gradient. The flow enhancement is found to have a similar equation to the Rabinowitsch formalism in fully develope