Simultaneous PIV and Shadowgraphy in slug flow: a solution for optical problems

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

S. Nogueira (Autor) Outra; R. G. Sousa (Autor) Outra; Alexandra Pinto (Autor) FEUP; M. L. Riethmuller (Autor) Outra; João Campos (Autor) FEUP

Revista

Título: Experiments in Fluids

Vol. 35

Páginas: 598-609

ISSN: 0723-4864

Editora: Springer Nature

Indexação

Scopus

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Outras Informações

DOI: 10.1007/s00348-003-0708-8

Abstract (EN): A recent technique of simultaneous particle image velocimetry (PIV) and pulsed shadow technique (PST) measurements, using only one black and white CCD camera, is successfully applied to the study of slug flow. The experimental facility and the operating principle are described. The technique is applied to study the liquid flow pattern around individual Taylor bubbles rising in an aqueous solution of glycerol with a dynamic viscosity of 113·10)3 Pa s. With this technique the optical perturbations found in PIV measurements at the bubble interface are completely solved in the nose and in annular liquid film regions as well as in the rear of the bubble for cases in which the bottom is flat. However, for Taylor bubbles with concave oblate bottoms, some optical distortions appear and are discussed. The measurements achieved a spatial resolution of 0.0022 tube diameters. The results reported show high precision and are in agreement with theoretical and experimental published data.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12