Estimation of viscosity from passage time of liquids flowing through a microchannel array

Yasuyuki Maki, Yumeno Endo, Miyako Fukushima, Mayumi Nishiyama, Toshiaki Dobashi, Hiroyuki Sumino, Masami Murakami

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Recently, a microchannel flow analyzer (MC-FAN) has been used to study the flow properties of blood. However, the correlation between blood passage time measured by use of the MC-FAN and hemorheology has not been clarified. In this study, a simple model is proposed for estimation of liquid viscosity from the passage time tp of liquids. The tp data for physiological saline were well represented by the model. According to the model, the viscosity of Newtonian fluids was estimated reasonably well from the tp data. For blood samples, although the viscosity ηmc estimated from tp was shown to be smaller than the viscosity η450s-1 measured by use of a rotatory viscometer at a shear rate of 450 s-1, ηmc was correlated with η450s-1. An empirical equation for estimation of η450s-1 of blood samples is proposed.

Original languageEnglish
Pages (from-to)69-73
Number of pages5
JournalJournal of Biorheology
Issue number1-2
Publication statusPublished - Mar 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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