PSI - Issue 71

Rahul Tarodiya et al. / Procedia Structural Integrity 71 (2025) 241–247

246

Fig. 5 Erosion rate of primary and secondary elbows with change in particle size at the velocity of 25 m/s.

(a) (b) Fig. 6 Erosion rate of primary and secondary elbows with change in velocity for particle sizes (a) 50 µm and (b) 200 µm.

4. Conclusions In the present study, CFD simulations were performed to investigate the erosion of elbows mounted in series. The effects of three different parameters, particle size, flow velocity, and the connecting pipe length between the two elbows, on the erosion of the primary and secondary elbows were evaluated. The following conclusions are drawn from this study: ● The erosion of the secondary elbow is greatly affected by the connecting pipe length due to the influence of secondary flows, developed from the primary elbows, on particle movement. The erosion rate of the secondary elbow is less compared to the primary elbow, and the difference between the two decreases with an increase in connecting pipe length. ● For small particle sizes (less than around 50 µm), the difference in erosion rates between the primary and secondary elbows is less. However, as particle size increases, this difference increases. Additionally, the variation in particle size influences the effect of connecting pipe length on the erosion of the secondary elbow. ● Flow velocity affects the erosion variation of elbows mounted in series. An increase in flow velocity leads to a greater difference in erosion rates between the primary and secondary elbows. References Adedeji, O.E., Duarte, C.A.R., 2020. Prediction of thickness loss in a standard 90◦ elbow using erosion -coupled dynamic mesh. Wear 460-461, 203400. Asgharpour, A., Zahedi, P., Arabnejad Khanouki, H., Shirazi, S.A., McLaury, B.S., 2017. Experimental and numerical study on solid particle erosion in elbows mounted in series. In: ASME Fluids Engineering Division Summer Meeting,