Spatial analisys of a perturbation wave in parallel two-phase flow

• Grant number: 10/03254-5
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Effective date (Start): July 01, 2010
• Effective date (End): February 28, 2013
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal Investigator: Oscar Mauricio Hernandez Rodriguez
• Grantee: Marcelo Souza de Castro
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

In many natural and industrial processes one can observe multiphase flows. Considering only gas-liquid andliquid-liquid mixtures, a geometric configuration that frequently occurs is the separated flow patterns. It isformed by the annular and stratified flow patterns. The former have been suggested as profitable alternativefor the transport and artificial elevation of highly viscous oils, and it's the most common flow pattern inrefrigeration systems and in the production of gas. The latter is taken as a convenient way to avoid theformation of water-in-oil emulsions in pipelines and of common occurrence in directional oil wells. One notesthat the development of more refined two-phase models is in order. The problem of the hydrodynamic stability of the parallel flow patterns along a long pipeline (oil and gas wells, risers and pipelines) is still an open question and it's not trivial, even when one takes a simple situation of isothermal flow. In this work the lineartheory of the hydrodynamic stability will be applied; it supposes that flow pattern transition can be caused by instabilities that result from the spatial amplification of a perturbation wave in the interface of the two phases. In this context, this research's goal is to apply the one-dimensional approach to study the hydrodynamic stability of the stratified and annular two-phase flow patterns. A transition criterion based on a spatial analysisof the hydrodynamic stability will be developed. The criterion's predictions will have to be validated against data to be taken at the Thermal-Fluids Engineering Laboratory (NETeF) of the Engineering School of São Carlos (EESC - USP). (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE CASTRO, MARCELO S.; RODRIGUEZ, OSCAR M. H.. Interfacial waves in stratified viscous oil-water flow. EXPERIMENTAL THERMAL AND FLUID SCIENCE, v. 62, p. 85-98, APR 2015. (10/03254-5)

DE CASTRO, MARCELO S.; PEREIRA, CLEBER C.; DOS SANTOS, JORGE N.; RODRIGUEZ, OSCAR M. H.. Geometrical and kinematic properties of interfacial waves in stratified oil-water flow in inclined pipe. EXPERIMENTAL THERMAL AND FLUID SCIENCE, v. 37, p. 171-178, FEB 2012. (10/03254-5, 08/06922-9)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CASTRO, Marcelo Souza de. Phenomenon of spatial transition in stratified heavy oil-water flow pattern. 2013. Doctoral Thesis - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.