Please use this identifier to cite or link to this item: https://doi.org/10.1007/s12206-009-0420-6
Title: Determination of rheological properties of whole blood with a scanning capillary-tube rheometer using constitutive models
Authors: Kim, S. 
Namgung, B.
Ong, P.K.
Cho, Y.I.
Chun, K.J.
Lim, D.
Keywords: Blood viscosity
Casson
Herschel-Bulkley
Power-law
Yield stress
Issue Date: Jun-2009
Source: Kim, S., Namgung, B., Ong, P.K., Cho, Y.I., Chun, K.J., Lim, D. (2009-06). Determination of rheological properties of whole blood with a scanning capillary-tube rheometer using constitutive models. Journal of Mechanical Science and Technology 23 (6) : 1718-1726. ScholarBank@NUS Repository. https://doi.org/10.1007/s12206-009-0420-6
Abstract: We examine the applicability of three different non-Newtonian constitutive models (power-law, Casson, and Herschel-Bulkley models) to the determination of blood viscosity and yield stress with a scanning capillary-tube rheometer. For a Newtonian fluid (distilled water), all three models produced excellent viscosity results, and the measured values of the yield stress with each model were zero. For unadulterated human blood, the Casson and Herschel-Bulkley models produced much stronger shear-thinning viscosity results than the power-law model. The yield stress values for the human blood obtained with the Casson and Herschel-Bulkley models were 13.8 and 17.5 mPa, respectively. The two models showed a small discrepancy in the yield stress values, but with the current data analysis method for the scanning capillary-tube rheometer, the Casson model seemed to be more suitable in determining the yield stress of blood than the Herschel-Bulkley model. © 2009 The Korean Society of Mechanical Engineers and Springer-Verlag GmbH.
Source Title: Journal of Mechanical Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/66999
ISSN: 1738494X
DOI: 10.1007/s12206-009-0420-6
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