Journal of Biorheology

, Volume 26, Issue 1–2, pp 69–73 | Cite as

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
Brief Communication
First Online:
Received:
Accepted:

Abstract

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 t p of liquids. The t p 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 t p data. For blood samples, although the viscosity \( \eta_{\text{mc}} \) estimated from t p was shown to be smaller than the viscosity \( \eta_{{450{\text{s}}^{ - 1} }} \) measured by use of a rotatory viscometer at a shear rate of 450 s−1, \( \eta_{\text{mc}} \) was correlated with \( \eta_{{450{\text{s}}^{ - 1} }} \). An empirical equation for estimation of \( \eta_{{450{\text{s}}^{ - 1} }} \) from \( \eta_{\text{mc}} \) of blood samples is proposed.

Keywords

Shear Rate Physiological Saline Newtonian Fluid Passage Time Apparent Viscosity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Japanese Society of Biorheology 2012

Authors and Affiliations

  • Yasuyuki Maki
    • 1
  • Yumeno Endo
    • 2
  • Miyako Fukushima
    • 2
  • Mayumi Nishiyama
    • 2
  • Toshiaki Dobashi
    • 1
  • Hiroyuki Sumino
    • 3
  • Masami Murakami
    • 2
  1. 1.Department of Chemistry and Chemical BiologyGraduate School of Engineering, Gunma UniversityKiryuJapan
  2. 2.Department of Clinical Laboratory Medicine, Graduate School of MedicineGunma UniversityMaebashiJapan
  3. 3.Clinical Laboratory CenterGunma University HospitalMaebashiJapan

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