CFD SIG: CFD Simulations and Experiments in Multiphase Flow for Predicting Solid Particle Erosion: Challenges and Success Stories

Speaker: Dr. Siamack A. Shirazi
Speaker Dr. Siamack A. Shirazi
Dr. Shirazi is Professor of Mechanical Engineering and the Director of the Erosion/Corrosion Research Center (E/CRC) at The University of Tulsa and is also a co-founder of Tulsa University Sand Management Projects in addition to many other consortia that he has contributed to. Shirazi has over 450 publications, technical and ...

Dr. Shirazi is Professor of Mechanical Engineering and the Director of the Erosion/Corrosion Research Center (E/CRC) at The University of Tulsa and is also a co-founder of Tulsa University Sand Management Projects in addition to many other consortia that he has contributed to. Shirazi has over 450 publications, technical and invited presentations from which most publications and conference presentations related to CFD and erosion-corrosion. Additionally, has taught short courses around the globe on these subjects and has advised numerous graduate students. To recognize his contributions for his research in Erosion-Corrosion, he has also received the prestigious NACE Technical Achievement award in 2013 and also received the rank of Fellow member from the American Society of Mechanical Engineers (ASME) in 2009 and also received the 2015 NACE International Fellow Award.   Professor Shirazi has served The University of Tulsa for 28 years and his teaching and research has advanced the state-of-the-art in the important field of erosion mitigation for oil field applications and he is known worldwide through his work for the sponsors of his research and through his publications. The methods developed by Dr. Shirazi and his students and colleagues at the E/CRC have replaced the long used, American Petroleum Institute Recommended Practice 14E (API RP 14E) for determining critical flow velocities to avoid erosion/corrosion damage. These methods are in software called SPPS for Sand Production Pipe Saver (or “Tulsa Model”) which is widely used around the world.

Full Description

Entrained sand particles in the oil/gas production fluid impinge on the inner surfaces of the pipes, fittings, and valves that result in solid particle erosion. Even in situations when sand control means are utilized such as gravel packing and sand screens, small sand particles can plug sand screens promoting higher flow velocities through other portions of sand screens causing failure of sand screens and allowing sand production.

Predicting solid particle erosion in multiphase flow is a complex task due to existence of different flow patterns. The existence of different flow patterns and sand and liquid holdup in vertical and horizontal pipes means that a unique erosion model has to be developed for each flow regime if the model has to account for the number and velocity of impacting particles. In current efforts at the Erosion/Corrosion Research Center, local void fraction measurements by Wire Mesh Sensors (WMS) and Computational Fluid Dynamics (CFD) simulations of multiphase flows are employed to aid in predicting gas-liquid-sand velocities in multiphase flows. For the first time, CFD is used to compute erosion rates in multiphase flow. CFD is a very useful tool for predicting details of multiphase flow. However, CFD results must be validated by grid refinement studies and by comparison to experimental data.

Erosion experiments are also conducted on elbows in a 3-inch and 4-inch large scale multiphase flow loop with gas, liquid and sand flowing in vertical and horizontal test sections. Based on the experimental data and simulations for different flow regimes including slug, wet gas and annular flow a mechanistic model is being developed to predict solid particle erosion rates of elbows in multiphase flow.

Organizer Sunil Lakshminarayanan

sunil_lakshminarayanan@oxy.com


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When?

Thu, Mar. 15, 2018
11:30 a.m. - 1 p.m. US/Central

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SPEI Houston Training Center
10777 Westheimer Rd. Houston, Suite 1075
Houston, Texas 77042
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