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 language | English |
|---|---|
| Pages (from-to) | 1719-1724 |
| Number of pages | 6 |
| Journal | KSME International Journal |
| Volume | 16 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2002 Dec |
| Externally published | Yes |
Keywords
- Blood Viscosity
- Capillary Viscometer
- Non-Newtonian Fluids
- Pressure
- Shear Rates
ASJC Scopus subject areas
- Mechanical Engineering