Verfahren zur Bestimmung einer Anzahl Viskoelastischer Eigenschaften einer Anzahl von Partikeln in einer Suspension, Vorrichtung für ein Solches Verfahren und Computerprogramm oder Computerprogrammprodukt

Details

Veröffentlichungs-Nr.

EP4209775

Aktenzeichen

EP22150396

Anmeldetag

5. Januar 2022

Veröffentlichung

29. Oktober 2025

Erteilung

29. Oktober 2025

Rechtsraum

EP

IPC

G01N3/06G01N3/10G01N15/14G01N11/08// G01N15/00G01N15/10

Abstract

A method for determining a number of viscoelastic properties, in particular stiffness (k) and fluidity (α), of a number of particles (4) of a suspension, is described, wherein the suspension comprises a suspension medium (10), in which the particles (4) are suspended, wherein said suspension is fed through a channel (6), said channel (6) extending in a longitudinal direction (L) and having a lateral extension (E) perpendicular to said longitudinal direction (L), wherein images (12) from the particles (4) in the channel (6) are recorded with an imaging unit (8) and in an imaging plane, wherein a number of particle properties are determined by analyzing the images (12) and wherein the viscoelastic properties of the particles (4) are derived from said particle properties, wherein the particles (4) inside the channel (6) are exposed to a shear stress (σ) deforming a shape of a respective particle (4) depending on its distance (D) to a channel center (14), wherein the channel (6) is configured such that the shear stress (σ) across a respective particle (4) varies by at most a maximum variation (V), for enabling a linear approximation of the shear stress (σ) when deriving the viscoelastic properties. In addition, a corresponding device (2) and computer program or computer program product are described.

Anmelder

Firma

Friedrich-Alexander-Universität Erlangen-Nürnberg

Land

🇩🇪 Deutschland

Fachgebiete