Finn Knüppel

Viscosity model for particle-laden fluids (e.g. blood) up to 5 % volume fraction in micro geometry flows : Research data publication : [research data]

University of Rostock, 2024

https://doi.org/10.18453/rosdok_id00004583

Abstract: This publication shows a viscosity model that accounts for cell migration in blood flow conditions for narrow gap flows and flow conditions similar to that of Ventricular Assist Devices. The groundwork for this model is derived from optical measurements in a microchannel with blood analog fluid and is validated with newly measured data using pig’s blood. The data of the optical measurements is used to determine the particle distribution in the channel. With predefined parameters like the Reynolds number and the Channel Height as well as measurements for the viscosity of the fluid, the viscosity model is then able to calculate and plot the particle concentration and viscosity distribution over the channel height. Also included in this model is a step function that to simplify the distribution. Using this model in simulations showed that the Wall Shear Stress from that Simulations is closer to the values of the experiments than the simulations without this model.

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