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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

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

Revista

Título: Chemical Engineering Science

Vol. 280

Páginas: 1-12

ISSN: 0009-2509

Editora: Elsevier

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Projetos Associados

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

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12