AN EXPERIMENTAL STUDY ON TURBULENT EMULSION (OIL-IN-WATER) FLUID FLOW THROUGH CURVED DIFFUSER | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 53, Volume 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., May 2012, Page 1-20 PDF (894.96 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2012.36975 | ||||
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| Authors | ||||
| W. A. El-Askary1; K. A. Ibrahim2; E. Wahba2; H. A. Omara2 | ||||
| 1Assoc. Professor; Mechanical Power Engineering Dept., Faculty of Engineering, Menoufiya University (Corresponding author), Tel.: +2-01005255817, +2-048-3486965; Fax: +2-048-2235695. | ||||
| 2Mechanical Power Engineering Dept., Faculty of Engineering, Menoufiya University. | ||||
| Abstract | ||||
| ABSTRACT The paper presents a comprehensive experimental study on emulsion (oil-in-water) fluid flow through curved diffusers. The experimental setup has been designed and constructed in the fluid mechanics laboratory of the faculty of engineering, Menoufiya University to perform the measurements which have been carried out on five models of curved diffusers. The measurements of pressure distributions along the outer and inner walls of the curved diffuser have been performed for different area ratios, different curvature ratios (ratio of centerline arc radius to inlet width), different inflow Reynolds numbers and different emulsion holdup (ratio of oil volume to emulsion volume), while the oil concentration has been varied from 0% to 20% by volume. The experimental work has been carried out using two sets of oil-in-water emulsions; the first is stable oil-in-water (o/w) emulsion using Sodium Dodecyl Sulfate (SDS) emulsifier and the second is unstable o/w emulsion at different holdup values. The energyloss coefficients for each model are based on detailed measurements of the wall pressure distributions along walls of the curved-diffuser models including long upstream and downstream tangents. The energy-loss coefficient data have been plotted versus of Reynolds number at different concentrations. New results on energy-loss coefficient during flow of unstable and stable oil-in-water emulsions through curved diffusers have been reported in the present paper. The diffuser energy-loss coefficient is strongly affected by the geometrical parameters of diffuser, Reynolds number and emulsion holdup. Generally for the flow in curved diffusers, the resistance coefficients for stable and unstable (oil-in-water) emulsions are higher than that of pure-water flow. It is also noticed that the unstable o/w emulsion exhibits lower values in loss coefficient compared with that given for stable o/w emulsion. General correlation of the loss coefficient (not previously considered) for the present cases exploring the ranges of geometrical parameters, inflow condition and Reynolds number conditions is extracted from the present experimental study. | ||||
| Keywords | ||||
| Holdup; Emulsion flow; Stable; Unstable; Energy losses; Curved diffusers models | ||||
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