Method and measuring arrangement for determining a rheological property of a fluid

US11982607B2 · kind B2 · utility

Assignees

• FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG · DE
• Julius-Maximilians-Universitat Wurzburg · DE

Inventors

• Dirk Schubert · Eggolsheim, DE
• Paul Dalton · Düsseldorf, DE
• Stefan Schruefer · Erlangen, DE

Key dates

• Filing date: Dec 23, 2021
• Grant date: May 14, 2024
• Expiry date: Jul 13, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2011/008
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In order to determine a rheological property of a fluid, the fluid is conveyed with a constant volume flow rate through a nozzle and the fluid strand thereby generated is deposited on a substrate. A relative movement takes place between the nozzle and the substrate at a forward feed velocity value. A contour of the liquid strand between the nozzle and the substrate is optically measured, and an extensional viscosity as a rheological property is deduced from knowledge of the volume flow rate, the forward feed velocity value and the contour of the fluid strand.