Novel PDMS-based transparent suspensions suitable for fluid flow characterization by optical techniques

• Type: Article in International Scientific Journal
• Date: 2023

Authors

João Carneiro (Author) FEUP; Joana Ferreira (Author) FEUP; Erica Doutel (Author) FEUP; João Miranda (Author) FEUP; João Campos (Author) FEUP

Journal

Title: Chemical Engineering Science

Vol. 280

Pages: 1-12

ISSN: 0009-2509

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Associated Projects

Healthy Waters - Healthy Waters - Identification, Elimination, Social Awareness and Education of Water Chemical and Biological Micropollutants with Health and Environmental Implications

Other information

Authenticus ID: P-00Y-VB1

DOI: 10.1016/j.ces.2023.119092

Abstract (EN): Optical measurement techniques, such as & mu;PIV and LDV are widely used in experimental fluid dynamics to investigate pure fluids or suspension flows. Optical access is a major concern in suspension experimentation. The suspended particle material must have a refractive-index matching those of the base fluid and wall set-up. This work reports a novel refractive-index-matched transparent suspension. The particulate matter is comprised of sub-10 & mu;m spherical PDMS particles. PMDS is a widely used material to manufacture microchannels due to its low-refractive-index and non-toxicity. PDMS microparticles were produced and suspended in a refractive-index matching base fluid (DMSO aqueous solution) and two transparent suspension concentrations were formulated [-10% and -18% (w/w)]. Suspension rheology was characterized, and optical properties analysed. & mu;PIV successfully measured the velocity flow of the transparent suspensions in a circular-section microchannel, and the velocity profiles agreed well with the analytical solution.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12