The computational fluid dynamics modeling of solid particles hydrodynamic based on the Lagrangian framework for diluted solidgas\r\nflow through 90�° gas pipeline bend is carried out to discover the effect of particles size distribution on particles flow pattern\r\nand their erosive effect on the bend. Particles size distribution has been obtained experimentally by measuring the sizes of solid\r\nparticles that are flowing through the gas pipelines of Aghajari gas booster station. Also the erosion rate at the outer wall of the bend\r\nis predicted. The pipeline bend under study has a pipe diameter of 56 inches and ratios of the bend radius of the curvature to the\r\npipeline diameter of 1.5. For the validation of computational model, firstly, the computationalmodeling is performed for a published\r\nexperimental solid-gas flow data.Thecomputational results include radial gas velocity and radial particle velocity profiles on planes\r\nwhich are at different angles through the bend.The comparison between the predicted numerical results and similar experimental\r\ndata proves that the predictions of the computational model are acceptable. Finally, the particlesâ�� size distributions on each plane\r\nthrough the bend and the erosion rate on the outer wall of the bend have been obtained. The maximum rate of erosion is found to\r\nbe 3.2 nm/s, occurring between 40 and 65�° of the bend
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