Eur. Phys. J. AP
Volume 2, Number 2, May 1998
|Page(s)||189 - 195|
|Published online||15 May 1998|
Correction of instrumental inertia effects in controlled stress rheometry
Laboratoire d'Énergétique et de Mécanique Théorique et Appliquée,
Institut National Polytechnique de Lorraine (CNRS–UMR 7563), 2
avenue de la forêt de Haye, BP 160, 54504 Vandœuvre-lès-Nancy, France
2 Laboratoire de Biorhéologie et d'Hydrodynamique Physico-Chimique, Université Paris 7, Denis Diderot (CNRS–URA 343), 2 place Jussieu, 75005 Paris, France
Accepted: 2 March 1998
Published online: 15 May 1998
An analysis of inertia effects in controlled stress rheometry is presented. For Newtonian fluids, this study takes exact account of both the instrumental inertia and the discontinuous stress change in this type of rheometer. In fact, supposedly smooth stress ramps are always approximated by a series of stress steps. The significance of this limitation, which is sometimes critical, is pointed out for the first time. The error induced by assuming that the stress ramps are smooth in Krieger's method for inertia correction , is quantitatively evaluated. An improved calculation for non-Newtonian, inelastic fluids is described.
PACS: 83.50.By – Transient deformation and flow; time-dependent properties: start-up, stress relaxation, creep, recovery, etc. / 83.85.-c – Techniques and apparatus / 83.85.Cg – Rheological measurements
© EDP Sciences, 1998
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.