Whole blood viscosity modeling using power law, Casson, and Carreau Yasuda models integrated with image scanning U-tube viscometer technique

This study presented the image scanning U-tube viscometer technique to measure the whole blood viscosity. Two different constitutive models, power law and Casson, were selected to calculate blood viscosity. Results were compared with rotating viscometer. They had a good agreement at higher shear rates. Three constitutive models power law, Casson and Carreau Yasuda models were applied to blood viscosity data and used to simulate transient blood height in the U-tube. Comparison of the U-tube simulation and the actual experiment showed that Carreau Yasuda model is the most accurate model for whole blood viscosity measurement