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

• Type: Article in International Scientific Journal
• Date: 2003

Authors

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

Journal

Title: Experiments in Fluids

Vol. 35

Pages: 598-609

ISSN: 0723-4864

Publisher: Springer Nature

Indexing

Scopus

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12