Bubble Analogy and stabilization of core-annular flow
Language: Inglés Publication details: New Orleans 2000Subject(s): Online resources: Summary: Transcripción del abstract publicado por el autor: A theory for the stabilization of annular liquid-liquid flow (i.e. core annular flow) in a horizontal pipe, when the two liquids have different densities and viscosities, is proposed. The analysis of the momentum equation in the cross section of the flow, including the interfacial tension effect, allows an interesting analogy between the peripheral flow around the core and the flow surrounding an ascending bubble. Based upon this mechanism, it is suggested that the viscous and inertial forces in core annular can be combined in a single drag force, which is analogous to the drag in bubbles. By modeling the action of the lubricating forces in this way, an equation is obtained which describes the interface shape. Results for the height-to-width aspect ratio of the core are compared with laboratory measurements done by the author for a heavy oil-water core annular flow in a horizontal pipe. A criterion for stabilization is proposed.| Current library | Status | Barcode | |
|---|---|---|---|
| Biblioteca virtual | Not for loan | 200021240 |
Artículo publicado en la página web de la Faculdade de Engenharia Mecânica da Universidade Estadual de Campinas, Brasil ; Sitio visitado en noviembre de 2002 ; Navegadores de Internet ; Adobe Acrobat (PDF)
Transcripción del abstract publicado por el autor: A theory for the stabilization of annular liquid-liquid flow (i.e. core annular flow) in a horizontal pipe, when the two liquids have different densities and viscosities, is proposed. The analysis of the momentum equation in the cross section of the flow, including the interfacial tension effect, allows an interesting analogy between the peripheral flow around the core and the flow surrounding an ascending bubble. Based upon this mechanism, it is suggested that the viscous and inertial forces in core annular can be combined in a single drag force, which is analogous to the drag in bubbles. By modeling the action of the lubricating forces in this way, an equation is obtained which describes the interface shape. Results for the height-to-width aspect ratio of the core are compared with laboratory measurements done by the author for a heavy oil-water core annular flow in a horizontal pipe. A criterion for stabilization is proposed.
