TY - JOUR ID - 20889 TI - Numerical modeling of sand particle erosion at return bends in gas-particle two-phase flow JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Farokhipour, Ali AU - Mansoori, zohreh - AU - Saffar-Avval, Majid AU - Ahmadi, Goodarz AD - Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran AD - Energy Reseach Center, Amirkabir university of technology AD - Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, New York, USA Y1 - 2018 PY - 2018 VL - 25 IS - Issue 6: Special Issue Dedicated to Professor Goodarz Ahmadi SP - 3231 EP - 3242 KW - Eulerian-Lagrangian approach KW - Particle tracking KW - Gas–solid erosion KW - CFD-based erosion modeling KW - Return bends DO - 10.24200/sci.2018.50801.1871 N2 - In gas and oil industry, erosion damages to pipe lines bends and elbows due to the presence of sand particles have been a challenging issue. In this study a computational model approach was for evaluating the erosion rates in different vertical return bends including sharp bend, standard elbow, 180° pipe bend and long elbow. The airflow in the pipe was simulated using the SIMPLE method and the k-ω SST turbulence model. An Eulerian-Lagrangian approach was used for predicting particle trajectories and the corresponding erosion rates. Different particle sizes and mass flow rates were considered and Oka model for evaluating the erosion rate was used in these simulations. Under the same conditions, the simulation results indicated that the sharp return bends experience the highest erosion rates and the 180° bends experience the lowest erosion among the studied configurations. It was also found that the erosion rate is linearly proportional to the mass flow rate of particles for all cases studied. UR - https://scientiairanica.sharif.edu/article_20889.html L1 - https://scientiairanica.sharif.edu/article_20889_923bf7d9c3b1c4668388cc2e6656ab1a.pdf ER -