A theoretical analysis was carried out to predict the influences of wall inclination angles of large reservoirs on the onset of gas entrainment during single and dual discharges from a stratified two-phase region. The findings reveal that when the wall inclination angle differs from zero, along with low values of Froude number, two distinct flow regimes occur: the gas-entrainment and no gas-entrainment regimes. A new criterion has been developed to predict the critical Froude number at the transition from the gas-entrainment to the no-gas-entrainment regime. The critical Froude number is defined as a function of the wall inclination angle for a single discharge. For dual discharge, the critical Froude number is found to be dependent on the wall inclination angle, the separating distance between the centerlines of the two branches, as well as the Froude number of the second branch. Furthermore, four different flow regions are mapped, representing the flow regime, as well as the two-phase flow for each branch. These maps serve to predict the flow regions, mass flow rates, and quality during single and dual two-phase discharges. For the gas-entrainment regime, the predicted values of the critical height at the onset of gas entrainment are compared with the experimental data reported in literatures. Comparisons showed good concurrence between the measured and predicted results. Furthermore, the influence of the wall inclination angle on the flow regions, the predicted critical height, and the location of the gas entrainment are presented and discussed at different values of independent variables.
Skip Nav Destination
e-mail: aminism@aun.edu.eg
Article navigation
February 2008
Research Papers
Influence of Wall Inclination Angles on the Onset of Gas Entrainment During Single and Dual Discharges From a Reservoir
M. Ahmed
M. Ahmed
Department of Mechanical Engineering,
e-mail: aminism@aun.edu.eg
Assiut University
, Assiut 71516, Egypt
Search for other works by this author on:
M. Ahmed
Department of Mechanical Engineering,
Assiut University
, Assiut 71516, Egypte-mail: aminism@aun.edu.eg
J. Fluids Eng. Feb 2008, 130(2): 021305 (16 pages)
Published Online: February 8, 2008
Article history
Received:
July 14, 2006
Revised:
July 16, 2007
Published:
February 8, 2008
Citation
Ahmed, M. (February 8, 2008). "Influence of Wall Inclination Angles on the Onset of Gas Entrainment During Single and Dual Discharges From a Reservoir." ASME. J. Fluids Eng. February 2008; 130(2): 021305. https://doi.org/10.1115/1.2813124
Download citation file:
Get Email Alerts
Cited By
Related Articles
Modeling of the Onset of Gas Entrainment From a Stratified Two-Phase Region Through Branches on a Curved Surface
J. Fluids Eng (July,2006)
Photographs on the Effect of Perforations on the Heat Transfer due to Laminar Flow Over an Extended Surface
J. Heat Transfer (August,2002)
Investigation of Paraffin Deposition During Multiphase Flow in Pipelines and Wellbores—Part 1: Experiments
J. Energy Resour. Technol (September,2002)
Using Transient Inflow Performance Relationships to Model the Dynamic Interaction Between Reservoir and Wellbore During Pressure Testing
J. Energy Resour. Technol (December,2008)
Related Chapters
Multiphase Flow Simulations of Sediment Particles in Mixed-flow Pumps
Mixed-flow Pumps: Modeling, Simulation, and Measurements
The Design and Implement of Remote Inclinometer for Power Towers Based on MXA2500G/GSM
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3
Extended Surfaces
Thermal Management of Microelectronic Equipment