An image analysis technique for the study of gas-liquid slug flow along vertical pipes - associated uncertainty

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

T. S Mayor (Autor) Outra; A. M. F. R. Pinto (Autor) FEUP; J. B. L. M. Campos (Autor) FEUP

Revista

Título: Flow Measurement and Instrumentation

Vol. 18 Nº 3

Páginas: 139-147

ISSN: 0955-5986

Editora: Elsevier

Indexação

ISI Web of Knowledge - 34 Citações

ISI Web of Science

Scopus - 41 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

CORDIS: Ciências Tecnológicas

Outras Informações

ID Authenticus: P-004-9P6

DOI: 10.1016/j.flowmeasinst.2007.05.004

Abstract (EN): An image analysis technique for the study of continuous co-current gas-liquid slug flow, in vertical columns, is reported. The technique comprises the automatic analysis of a sequence of video frames with the purpose of object (bubbles) tracking and characterization (dimension, velocity, distance). Its applicability to continuous slug flow conditions (even for very large number of bubbles) and the high accuracy of the results are the main added value of the proposed technique. The evaluation of the uncertainty associated with the parameters measured is performed (following the general uncertainty analysis approach). Partial uncertainties are acknowledged in bubble boundary definition, time measurement and calibration procedure. Expressions are derived for the computation of the overall uncertainty of bubble velocity, bubble length and liquid slug length. Global relative uncertainties of 5%, 2.5% and 7%, were found, for these parameters. The uncertainty estimation supports the ongoing trend for the implementation of image analysis techniques for the study of slug flow patterns.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9