Author, as appears in the article.: Benhmidene A; Chaouachi B; Bourouis M; Gabsi S
Department: Enginyeria Mecànica
URV's Author/s: Bourouis Chebata, Mahmoud
Keywords: Void fraction profiles Void fraction Vertical 2-phase flow Vapors Vapor velocities Two phase flow Two fluid model Tubes (components) Tubes Tube length Tube diameters Transition Thermodynamic properties System Simulation Pumps Pump performance Numerical predictions Liquids Liquid velocities Heat flux Gas-liquid flow Forecasting Flow simulation Flow regimes Flow patterns Flow pattern Constant heat flux Churn flow Channels Bubble pump Binary-mixtures Ammonia water 2-fluid model
Abstract: In the present study, the ammonia-water mixing flow in a bubble pump is numerically simulated. The flow patterns of a two-phase flow in a bubble pump were studied under different conditions of heat flux and tube diameter. A one-dimensional two-fluid model was developed under constant heat flux. This model was used to predict the variations in void fraction and liquid and vapor velocities throughout the tube. Then, the void fraction profile and the curve of liquid velocity versus vapor velocity were used to predict the flow patterns along the tube length. It was found that at heat fluxes below 15 kW m -2, bubbly, slug, and churn flows are the dominating regimes, and the length of these flow regimes depends on the tube diameter. For heat fluxes higher than 15 kW m-2, the bubble pump operates under the churn and annular regimes, and the bubble pump performance is improved when the tube diameter increases. © 2011 American Society of Mechanical Engineers.
Thematic Areas: Mechanical engineering Engineering, mechanical Engenharias iii
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: mahmoud.bourouis@urv.cat
Author identifier: 0000-0003-2476-5967
Record's date: 2023-02-19
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://asmedigitalcollection.asme.org/fluidsengineering/article-abstract/133/3/031302/412211/Numerical-Prediction-of-Flow-Patterns-in-Bubble?redirectedFrom=fulltext
Papper original source: Journal Of Fluids Engineering-Transactions Of The Asme. 133 (3):
APA: Benhmidene A; Chaouachi B; Bourouis M; Gabsi S (2011). Numerical prediction of flow patterns in bubble pumps. Journal Of Fluids Engineering-Transactions Of The Asme, 133(3), -. DOI: 10.1115/1.4003664
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1115/1.4003664
Entity: Universitat Rovira i Virgili
Journal publication year: 2011
Publication Type: Journal Publications
Repositori URV