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Multiphase Science and Technology
EROSION OF ELBOWS IN SERIES FOR LIQUID-DOMINATED MULTIPHASE FLOWS: A CFD AND EXPERIMENTAL ANALYSIS
Thiana A. Sedrez
Erosion/Corrosion Research Center, Department of Mechanical Engineering, University of Tulsa, Tulsa, OK
Siamack A. Shirazi
Erosion/Corrosion Research Center, Department of Mechanical Engineering,
University of Tulsa, Tulsa, OK
Sand particles entrained in oil and gas is a major problem for the petroleum industry. Sand production especially increases with increased liquid production, and particles can impact the walls of piping and equipment causing solid particle erosion. Predicting erosion under multiphase flow conditions is an important task for the safe operation of oil and gas production. Most of the previous experimental data and modeling work for pipe erosion in multiphase flow is for gas-dominated flows in a single elbow. The current work investigates erosion in liquid-dominated multiphase flows involving elbows in series by utilizing computational fluid dynamics (CFD) and comparing the results to experimental data. Experiments have been conducted in a 50.8 mm diameter facility to measure thickness loss of elbows that are installed in series. CFD simulations have been performed using various multiphase flow models, gas bubbles sizes, particle drag models, and other forces acting on particles to examine the effects of these parameters on erosion prediction in liquid-dominated multiphase flows. High-speed camera photography has been used to estimate gas volume fraction in this complex multiphase flow. The current investigation shows that it is important to accurately model multiphase flow to obtain erosion results that are in good agreement with the experimental observations, especially for this complex geometry.
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