Model-independent relationships between hematocrit, blood viscosity, and yield stress derived from Couette viscometry data

Yeow, Y.Leong, Wickramasinghe, S.Ranil, Leong, Yee-Kwong, and Han, Binbing (2002) Model-independent relationships between hematocrit, blood viscosity, and yield stress derived from Couette viscometry data. Biotechnology Progress, 18 (5). pp. 1068-1075.

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Abstract

This paper describes a procedure, based on Tikhonov regularization, for obtaining the shear rate function or equivalently the viscosity function of blood from Couette viscometry data. For data sets that include points where the sample in the annulus is partially sheared the yield stress of blood will also be obtained. For data sets that do not contain partially sheared points, provided the shear stress is sufficiently low, a different method of estimating the yield stress is proposed. Both the shear rate function and yield stress obtained in this investigation are independent of any rheological model of blood. This procedure is applied to a large set of Couette viscometer data taken from the literature. Results in the form of shear rate and viscosity functions and yield stress are presented for a wide range of hematocrits and are compared against those reported by the originators of the data and against independently measured shear properties of blood.

Item ID: 12100
Item Type: Article (Refereed Research - C1)
Keywords: blood; Couette viscometry; yield stress
ISSN: 1520-6033
Date Deposited: 20 Dec 2010 03:09
FoR Codes: 09 ENGINEERING > 0904 Chemical Engineering > 090499 Chemical Engineering not elsewhere classified @ 100%
SEO Codes: 86 MANUFACTURING > 8601 Processed Food Products and Beverages (excl. Dairy Products) > 860199 Processed Food Products and Beverages (excl. Dairy Products) not elsewhere classified @ 100%
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