A method of isolating surface tension and yield stress effects in a U-shaped scanning capillary-tube viscometer using a Casson model

Autor:	William N. Hogenauer, Sangho Kim, Kenneth Kensey, Young I. Cho
Rok vydání:	2002
Předmět:	Materials science Capillary action Applied Mathematics Mechanical Engineering General Chemical Engineering Analytical chemistry Viscometer Repeatability Condensed Matter Physics Ubbelohde viscometer Surface tension Viscosity Distilled water Bovine blood General Materials Science
Zdroj:	Journal of Non-Newtonian Fluid Mechanics. 103:205-219
ISSN:	0377-0257
DOI:	10.1016/s0377-0257(02)00004-6
Popis:	The present study introduces a method to consider different surface tensions at two riser tubes for the viscosity measurements of fluids using a U-shaped scanning capillary-tube viscometer (SCTV). The accuracy and repeatability of the SCTV were demonstrated by comparing the viscosity results of distilled water obtained from the SCTV with the well-accepted reference data for water. Non-Newtonian viscosities of bovine blood containing 7.5% ethylenediaminetetraacetic acid (EDTA) and fresh human blood were measured at 25 °C and at a body temperature of 37 °C, respectively. The viscosity results for bovine blood gave excellent agreement with the results obtained from a rotating viscometer. The results demonstrate that whole blood viscosity can be measured over a range of shear-rates in less than 2–3 min without any anticoagulants using disposable U-shaped capillary-tube sets.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fba7c67afdfc70aadaffe762ddd79b9c https://doi.org/10.1016/s0377-0257(02)00004-6 Zobrazit plný text záznamu Full Text from ScienceDirect