High‐Shear Viscometry with a Rotational Parallel‐Disk Device

Autor:	R. W. Connelly, J. Greener
Rok vydání:	1985
Předmět:	Materials science Mechanical Engineering Rheometer Thermodynamics Mechanics Apparent viscosity Condensed Matter Physics Non-Newtonian fluid Simple shear Shear rate Generalized Newtonian fluid Mechanics of Materials Shear stress General Materials Science Shear flow
Zdroj:	Journal of Rheology. 29:209-226
ISSN:	1520-8516 0148-6055
DOI:	10.1122/1.549828
Popis:	A novel technique for measuring viscosity at high shear rates is described. The technique is an extension of a well‐established method, parallel‐disk viscometry, which has been limited traditionally to low shear rates ( 50,000 s−1) to be attained without disrupting the torsional flow field, and thus controlled measurements of viscosity could be made at those shear rates. The presence of flow disturbances such as shear heating, surface fracture, and radial migration, common impediments in high‐shear measurements, can be readily detected with a thixotropic loop program, and the effect of such disturbances can be separated from the actual rheological response of the fluid. Data are presented on some well‐defined fluids, both Newtonian and shear‐thinning, and the limitations of this technique are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cee3828dca0d3a163823c56fef959572 https://doi.org/10.1122/1.549828 Zobrazit plný text záznamu