Blood viscosity measurements using a pressure-scanning capillary viscometer

Sehyun Shin, Do Young Keum, Yun H. Ku

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A previously designed capillary viscometer with measuring differential pressure was modified to measure the viscosity of non-Newtonian fluids including unadulterated blood continuously over numerous shear rates in a single measurement. Because of unavoidable experimental noise and a limited number of data, the previous capillary viscometer experienced an inaccuracy and could not directly determine a viscosity without an iterative calculation. However, in the present measurement there are numerous data available near the point of interest so that the numeric value of the derivative, d(ln Q) / d(ln τw), is no longer sensitive to the method of differentiation. In addition, relatively low and wide shear rate viscosity measurements were possible because of the present precision pressure-scanning method with respect to time. For aqueous polymer solutions, excellent agreement was found between the results from the pressure-scanning capillary viscometer and those from a commercially available rotating viscometer. In addition, the pressure-scanning capillary viscometer measured the viscosity of unadulterated whole blood without adding any anticoagulants.

Original languageEnglish
Pages (from-to)1719-1724
Number of pages6
JournalKSME International Journal
Volume16
Issue number12
Publication statusPublished - 2002 Dec 1
Externally publishedYes

Fingerprint

Viscometers
Viscosity measurement
Blood
Scanning
Viscosity
Shear deformation
Polymer solutions
Derivatives
Fluids

Keywords

  • Blood Viscosity
  • Capillary Viscometer
  • Non-Newtonian Fluids
  • Pressure
  • Shear Rates

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Blood viscosity measurements using a pressure-scanning capillary viscometer. / Shin, Sehyun; Keum, Do Young; Ku, Yun H.

In: KSME International Journal, Vol. 16, No. 12, 01.12.2002, p. 1719-1724.

Research output: Contribution to journalArticle

Shin, Sehyun ; Keum, Do Young ; Ku, Yun H. / Blood viscosity measurements using a pressure-scanning capillary viscometer. In: KSME International Journal. 2002 ; Vol. 16, No. 12. pp. 1719-1724.
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