*Proceeding Paper* **Numerical Study of Gas-Sand Two-Phase Flow Erosion in a Standard 90***◦* **Elbow †**

**Nauman Khan, Muhammad Rehan Khan \*, Sati Ullah, Tariq Talha, Muhammad Ali Khan and Zubair Sajid**

Department of Mechanical Engineering, College of Electrical and Mechanical Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan; dnaumankhan890@gmail.com (N.K.); satiullahmaikash507@gmail.com (S.U.); tariq.talha@ceme.nust.edu.pk (T.T.); mak.ceme@ceme.nust.edu.pk (M.A.K.); zubair.sajid@ceme.nust.edu.pk (Z.S.)

**\*** Correspondence: mrehan.khan@ceme.nust.edu.pk

† Presented at the Third International Conference on Advances in Mechanical Engineering 2023 (ICAME-23), Islamabad, Pakistan, 24 August 2023.

**Abstract:** Erosive wear is a common problem in hydrocarbon industry pipelines transporting a multi-phase flow. Erosion is more critical in flow-changing devices, like tees, elbows, U- bends, valves, and chokes. By performing numerical simulations, this research investigation focuses on pre-eminent parameters that influence elbow wear, including erodent size and flow velocity. In this analysis, particle diameters of 150 and 300 μm and velocities of 11, 15, and 23 m/s were used. At a velocity of 11 m/sec, the erosion rate induced by a particle size of 300 μm was 1.62 times higher than with a particular size of 150 μm. Similarly, when the velocity was increased from 15 m/s to 23 m/s for the same particle size of 300 μm, the erosion rate was increased by 3.23 times.

**Keywords:** elbow erosion; two-phase flow; numerical analysis
