2nd Place, 95th Annual Meeting, Oct 2024, Austin - Jarno L. Waeterloos
2nd Place, 95th Annual Meeting, Oct 2024, Austin
A novel calibration procedure for orthogonal superposition measurements Jarno L. Waeterloos and Christian Clasen
Chemical Engineering Department, KU Leuven, Leuven, Belgium
Session
Poster Session
Title
A novel calibration procedure for orthogonal superposition measurements
Presentation Date and Time
October 16, 2024 (Wednesday) 6:30
Track / Room
Poster Session / Waterloo 3 & 4
Authors (Click on name to view author profile)
Author and Affiliation Lines (in printed abstract book)
Jarno L. Waeterloos and Christian Clasen
Chemical Engineering Department, KU Leuven, Leuven 3000, Belgium
Speaker / Presenter
Waeterloos, Jarno L.
Keywords
experimental methods; theoretical methods; methods; techniques
Text of Abstract
Many materials undergo transient microstructural evolutions when subjected to steady shear flows. Measurement methodologies include subjecting the material to a steady shear while simultaneously applying an oscillation either in the mutual direction (parallel superposition - PSP) or in the perpendicular direction (orthogonal superposition - OSP). While PSP has the disadvantage of coupled flow fields leading to convoluted results, OSP can easily be used to gain insight into the material behavior under flow and serves as a framework for the development of novel methods. Although both techniques are commercially available for the TA ARES-G2 rheometer, the calibration of such setups has received little attention to enable proper accuracy over the whole frequency range. Traditionally, the rheometer parameters are determined using suspended weights or calibrated springs and the results are fitted to a mass-spring-damper differential equation [1]. Effects from the slotted orthogonal double-walled Couette are corrected by so-called end-factors [2].